Builders Without Tools – Bianki

Posted on November 10, 2021 by The Mitr

In this post, we will see the book Builders Without Tools by Vitaly Bianki.

About the book

This little book describes how different birds like magpies, night-jars, willow tits, swallows, thrush, woodpecker and eagle build their amazing nests without using any tools.

The book was translated from Russian by Tom Botting and was illustrated by V. Fedotov. The book was published in 1980 by Malysh.

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Posted in books, children's books, children's stories, malysh publishers | Tagged bird watching, birds, children's book, illustrated book, nests, popular science, soviet | Leave a comment

Why Tuppy Doesn’t Chase Birds – Charushin

Posted on November 9, 2021 by The Mitr

In this post, we will see the book Why Tuppy Doesn’t Chase Birds by Y. Charushin.

About the book

In this book you will know about a little mischievous cat named Tuppy and her adventures. Read the book to know why this little cat does not chase any birds!

The book was translated from Russian by Fainna Glagoleva and illustrated by the author. The book was published in 1976 by Progress Publishers. Note: title pages are missing.

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Contents

Posted in books, children's books, children's stories, picture books, progress publishers, soviet | Tagged birds, cat, children's book, illustrated book, purring, soviet, stories, tuppy the cat | Leave a comment

Lectures in Geometry – Semester 5 Lie Groups and Lie Algebras – Postnikov

Posted on November 8, 2021 by The Mitr

In this post, we will see the book Lectures in Geometry – Semester 5 Lie Groups and Lie Algebras by M. Postnikov. This book is the first one of a five part Lectures in Geometry series. So far we have volumes 1, 2 and 5, volumes 3 and 4 are missing. If anyone has access to volumes 3 and 4 please consider posting them.

About the book

This textbook like the rest of the series is compiled from lectures delivered by the author to students at Moscow State University. The audience was made up of final year students and postgraduates, and as a consequence, a certain level of knowledge (for example, the properties of manifolds) is assumed. The lectures fall into five parts. The first covers the basic concepts of Lie groups, Lie algebras, and the Lie algebra of a given Lie group. The second part deals with “ locality theory”, the third generalizes these ideas. The first three sections could be used as a foundation course in Lie algebras for beginners. The fourth part considers Lie subgroups and Lie factor groups. The final part has a purely algebraic character, and is practically independent of the preceding four parts; it considers a proof of Ado’s theorem, which is interesting in itself. This book will be useful for mathematics students taking courses in Lie algebras, because it contains all the major results and proofs in compact and accessible form.

The book was translated from Russian by by Vladimir Shokurov and was published in 1986 by Mir.

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Preface 10

Lecture 1 15

Smooth and topological groups. Relaxing the conditions defining Lie groups. Examples of Lie groups. Cayley transformation. Further examples of Lie groups. Connected and arcwise connected spaces and groups. Reduction of any smooth groups to connected groups. Examples of connected Lie groups

Lecture 2 33

Left-invariant vector fields. Parallelizability of Lie groups. Integral curves of left-invariant vector fields and one-parameter subgroups. Lie functor. An example: a group of invertible elements of an associative algebra. Functions with values in an associative algebra. One-parameter subgroups of the group G (𝓐)

Lecture 3 51

Matrix Lie groups admitting the Cayley construction. A generalization of the Cayley construction. Groups possessing ln-images. Lie algebras. Examples of Lie algebras. Lie algebras of vector fields. The Lie algebra of a Lie group. An example: the Lie algebra of a group of invertible elements of an associative algebra. Locally isomorphic Lie groups. Local Lie groups. Lie functor on the category of local Lie groups

Lecture 4 71

The exponent of a linear differential operator. A formula for the values of smooth functions in the normal neighbourhood of the identity of a Lie group. A formula for the values of smooth functions on the product of two elements. The Campbell-Hausdorff series and Dynkin polynomials. The convergence of a Campbell-Hausdorff series. The reconstruction of a local Lie group from its Lie algebra. Operations in the Lie algebra of a Lie group and one-parameter subgroups. Differentials of internal automorphisms. The differential of an exponential mapping. Canonical coordinates. The uniqueness of the structure of a Lie group. Groups without small subgroups and Hilbert’s fifth problem

Lecture 5 98

Free associative algebras. Free Lie algebras. The basic lemma. The universal enveloping algebra. The embedding of a Lie algebra into its universal enveloping algebra. Proof of the fact that the algebra I <X> is free. The Poincaré-Birkhoff-Witt theorem. Tensor products of vector spaces and of algebras. Hopf algebras

Lecture 6 116

The Friedrichs theorem. The proof of Statement B of Lecture 4. The Dynkin theorem. The linear part of a Campbell-Hausdorff series. The convergence of a Campbell-Hausdorff series. Lie group algebras. The equivalence of the categories of local Lie groups and of Lie group algebras. Isomorphism of the categories of Lie group algebras and of Lie algebras. Lie’s third theorem

Lecture 7 134

Local subgroups and sub-algebras. Invariant local subgroups and ideals. Local factor groups and quotient algebras. Reducing smooth local groups to analytic ones. Pfaffian systems. Sub-fiberings of tangent bundles. Integrable sub-fiberings. Graphs of a Pfaffian system. Involutory sub-fiberings. The complete univalence of a Lie functor. The involutedness of integrable sub-fiberings. Completely integrable sub-fiberings

Lecture 8 159

Coverings. Sections of coverings. Pointed coverings. Coamalgams. Simply connected spaces. Morphisms of coverings. The relation of quasi-order in the category of pointed coverings. The existence of simply connected coverings. Questions of substantiation. The functorial property of a universal covering

Lecture 9 183

Smooth coverings. Isomorphism of the categories of smooth and topological coverings. The existence of universal smooth coverings. The coverings of smooth and topological groups. Universal coverings of Lie groups. Lemmas on topological groups. Local isomorphisms and coverings. The description of locally isomorphic Lie groups

Lecture 10 197

Local isomorphisms and isomorphisms of localizations. The Cartan theorem. A final diagram of categories and functors. Reduction of the Cartan theorem. The globalizability of embeddable localigroups. Reducing the Cartan theorem to the Ado theorem

Lecture 11 208

Sub-manifolds of smooth manifolds. Subgroups of Lie groups.
Integral manifolds of integrable sub-fiberings. Maximal integral manifolds. The idea of the proof of Theorem 14. The local structure of sub-manifolds. The uniqueness of the structure of a locally rectifiable sub-manifold with a countable base. Sub-manifolds of manifolds with a countable base. Connected Lie groups have a countable base. The local rectifiability of maximal integral manifolds. The proof of Theorem 1

Lecture 12 228

Alternative definitions of a subgroup of a Lie group. Topological subgroups of Lie groups. Closed subgroups of Lie groups. Algebraic groups. Groups of automorphisms of algebras. Groups of automorphisms of Lie groups. Ideals and invariant subgroups. Quotient manifolds of Lie groups. Quotient groups of Lie groups. The calculation of fundamental groups. The simple-connectedness of groups SU (n) and Sp (n). The fundamental group of a group U(n)

Lecture 13 247

The Clifford algebra of a quadratic functional. ℤ_2-graduation of a Clifford algebra. More about tensor multiplication of vector spaces and algebras. Decomposition of Clifford algebras into a skew tensor product. The basis of a Clifford algebra. Conjugation in a Clifford algebra. The centre of a Clifford algebra. A Lie group Spin(n). The fundamental group of a group SO(n). Groups Spin(n) with n < 4. Homomorphism 𝜒. The group Spin(6). The group Spin(5). Matrix representations of Clifford algebras. Matrix representations of groups Spin(n). Matrix groups in which groups Spin(n) are represented. Reduced representations of groups Spin(n). Additional facts from linear algebra

Lecture 14 286

Doubling of algebras. Metric algebras. Normed algebras. Automorphisms and differentiations of metric algebras. Differentiations of a doubled algebra. Differentiations and automorphisms of the algebra ℍ. The algebra of octaves. The Lie algebra g_2ℂ. Structural constants of the Lie algebra g_2ℂ. Representation of the Lie algebra g_2ℂ, by generators and relations

Lecture 15 306

Identities in the octave algebra ℂ_a. Sub-algebras of the octave algebra ℂa. The Lie group G_2. The SH teat principle for the group Spin(8). The analogue of the triplicity principle for the group Spin(9). The Albert algebra 𝔸l. The octave projection plane

Lecture 16 327

Scalar products in the algebra 𝔸l. Automorphisms and differentiations of the algebra 𝔸l. Adjoint differentiations of the algebra 𝔸l. The Freudenthal theorem. Consequences of the Freudenthal theorem. The Lie group F_4. The Lie algebra f_4. The structure of the Lie algebra fℂ_4

Lecture 17 346

Solvable Lie algebras. The radical of a Lie algebra. Abelian Lie algebras. The centre of a Lie algebra. Nilpotent Lie algebras. The nil-radical of a Lie algebra. Linear Lie nil-algebras. The Engel theorem. Criteria of nil-potency. Linear irreducible Lie algebras. Reductive Lie algebras. Linear solvable Lie algebras. The nilpotent radical of a Lie algebra

Lecture 18 360

Trace functional. Killing’s functional. The trace functional of a representation. The Jordan decomposition of a linear operator. The Jordan decomposition of the adjoint operator. The Cartan theorem on linear Lie algebras. Proving Cartan’s criterion for the solvability of a Lie algebra. Linear Lie algebras with a nonsingular trace functional. Semisimple Lie algebras. Cartan’s criterion for semisimplicity. Casimir operators

Lecture 19 377

Cohomologies of Lie algebras. The Whitehead theorem. The Fitting decomposition. The generalized Whitehead theorem. The Whitehead lemmas. The Weyl complete reducibility theorem. Extensions of Abelian Lie algebras

Lecture 20 391

The Levi theorem. Simple Lie algebras and simple Lie groups. Cain and unimodular groups. Schur’s lemma. The centre of a simple matrix Lie group. An example of a non-matrix cats Lie group. De Rham cohomologies. Cohomologies of the Lie algebras of vector fields. Comparison between the cohomologies of a Lie group and its Lie algebra

Lecture 21 404

Killing’s functional of an ideal. Some properties of differentiations. The radical and nilradical of an ideal. Extension of differentiations to a universal enveloping algebra. Ideals of finite co-dimension of an enveloping algebra. The radical of an associative algebra. Justification of the inductive step of the construction. The proof of the Ado theorem. Conclusion

Supplement to the English Translation. (Proof of the Cartan theorem by V.V. Gorbatsevich) 418

Bibliography 431
Subject Index 433

Posted in books, mathematics, mir books, mir publishers, soviet | Tagged ado theorem, Campbell-Hausdorff series, Canonical coordinates, cartan theorem, cayley construction, Clifford algebra, cohomologies, Cohomologies of Lie algebras, coverings, De Rham cohomologies, Doubling of algebras, Dynkin polynomials, engel theorem, Free associative algebras, Friedrichs theorem, hilbert's fifth problem, hopf algebras, integral manifolds, isomophisms, jordan decomposition, Killing’s functional, levi theorem, lie algebras, lie groups, linear differential operators, mathematics, matrix lie groups, Matrix representations of Clifford algebras, Metric algebras, nil-radical of a Lie algebra, Nilpotent Lie algebras, Normed algebras., Poincaré-Birkhoff-Witt theorem, Schur’s lemma, sub-algebras, sub-fiberings, subgroups, topological groups, Trace functional, whitehead theorem | 1 Comment

Lectures in Geometry – Semester 2 Linear Algebra and Differential Geometry – Postnikov

Posted on November 7, 2021 by The Mitr

In this post, we will see the book Lectures in Geometry – Semester 2 Linear Algebra and Differential Geometry by M. Postnikov. This book is the first one of a five part Lectures in Geometry series. So far we have volumes 1, 2 and 5, volumes 3 and 4 are missing. If anyone has access to volumes 3 and 4 please consider posting them.

About the book

This textbook directly continues the first volume of a course of geometry (M. M. Postnikov. Lectures in Geometry: Semester 1. Analytic Geometry. Moscow, Mir Publishers, 1981) based on lectures read by the author at Moscow University for students specializing in mathematics. lt contains 27 lectures, each a nearly exact reproduction of an original lecture. It treats linear algebra, with elementary differential geometry of curves and surfaces in three-dimensional space added to pave the way for further discussions.

The book was translated from Russian by by Vladimir Shokurov and was published in 1982 by Mir.

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Preface 5

Lecture 1 11

Vector spaces. Subspaces. Intersection of subspaces. Linear spans. A sum of subspaces. The dimension of a subspace. The dimension of a sum of subspaces. The dimension of a linear span

Lecture 2 19

Matrix rank theorem. The rank of a matrix product. The Kronecker-Capelli theorem. Solution of systems of linear equations

Lecture 3 28

Direct sums of subspaces. Decomposition of a space as a direct sum of subspaces. Factor spaces. Homomorphisms of vector spaces. Direct sums of spaces

Lecture 4 36

The conjugate space. Dual spaces. A second conjugate space. The transformation of a conjugate basis and of the coordinates of covectors. Annulets. The space of solutions of a system of homogeneous linear equations

Lecture 5 47

An annulet of an annulet and annulets of direct summands. Bilinear functionals and bilinear forms. Bilinear functionals in a conjugate space. Mixed bilinear functionals. Tensors

Lecture 6 58

Multiplication of tensors. The basis of a space of tensors. Contraction of tensors. The rank space of a multilinear functionals

Lecture 7 64

The rank of a multilinear functional. Functionals and permutations. Alternation

Lecture 8 72

Skew-symmetric multilinear functionals. External multiplication. Grassman algebra. External sums of covectors. Expansion of skew-symmetric functionals with respect to the external products of covectors of a basis

Lecture 9 82

The basis of a space of skew-symmetric functionals. Formulas for the transformation of the basis of that space. Multivectors. The external rank of a skew-symmetric functional. Multivector rank theorem. Conditions for the equality of multivectors

Lecture 10 92

Cartan’s divisibility theorem. Plücker relations. The Plücker coordinates of subspaces. Planes in an affine space. Planes in a projective space and their coordinates

Lecture 11 106

Symmetric and skew-symmetric bilinear functionals. A matrix of symmetric bilinear functionals. The rank of a bilinear functional. Quadratic functionals and quadratic forms. Lagrange theorem

Lecture 12 118

Jacobi theorem. Quadratic forms over the fields of complex and real numbers. The law of inertia. Positively definite quadratic functionals and forms

Lecture 13 127

Second degree hypersurfaces of an n-dimensional projective space. Second degree hypersurfaces in a complex and a real-complex projective space. Second degree hypersurfaces of an n-dimensional affine space. Second degree hypersurfaces in a complex and a real-complex affine space

Lecture 14 140

The algebra of linear operators. Operators and mixed bilinear functionals. Linear operators and matrices. Invertible operators. The adjoint operator. The Fredholm alternative. Invariant subspaces and induced operators

Lecture 15 151

Eigenvalues. Characteristic roots. Diagonalizable operators. Operators with simple spectrum. The existence of a basis in which the matrix of an operator is triangular. Nilpotent operators

Lecture 16 160

Decomposition of a nilpotent operator as a direct sum of cyclic operators. Root subspaces. Normal Jordan form. The Hamilton-Cayley theorem

Lecture 17 170

Complexification of a linear operator. Proper subspaces belonging te characteristic roots. Operators whose complexification is diagonalizable

Lecture 18 179

Euclidean and unitary spaces. Orthogonal complements. The identification of vectors and covectors. Annulets and orthogonal complements. Bilinear functionals and linear operators. Elimination of arbitrariness in the identification of tensors of different types. The metric tensor. Lowering and raising of indices

Lecture 19 191

Adjoint operators. Self-adjoint operators. Skew-symmetric and skew-Hermitian operators. Analogy between Hermitian operators and real numbers. Spectral properties of self-adjoint operators. The orthogonal diagonalizability of self-adjoint operators

Lecture 20 199

Bringing quadratic forms into canonical form by orthogonal transformation of variables. Second degree hypersurfaces in a Euclidean point space. The minimax property of eigenvalues of self-adjoint operators. Orthogonally diagonalizable operators

Lecture 21 208

Positive operators. Isometric operators. Unitary matrices. Polar factorization of invertible operators. A geometrical interpretation of polar factorization. Parallel translations and centroaffine transformations. Bringing a unitary operator into diagonal form. А rotation of an n-dimensional Euclidean space as a composition of rotations in two-dimensional planes

Lecture 22 221

Smooth functions. Smooth hypersurfaces. Gradient. Derivatives with respect to a vector. Vector fields. Singular points of a vector field. A module of vector fields. Potential and irrotational vector fields. The rotation of a vector field. The divergence of a vector field. Vector analysis. Hamilton’s symbolic vector. Formulas for products. Compositions of operators

Lecture 23 243

Continuous, smooth, and regular curves. Equivalent curves. Regular curves in the plane and graphs of functions. The tangential hyperplane of a hypersurface. The length of a curve. Curves in the plane. Curves in a three-dimensional space

Lecture 24 262

Projections of a curve onto the coordinate planes of the moving n-hedron. Frenet’s formulas for a curve in the n-dimensional space. Representation of a curve by its curvatures. Regular surfaces. Examples of surfaces

Lecture 25 276

Vectors tangential to a surface. The tangential plane. The first
quadratic form of a surface. Mensuration of lengths and angles on a surface. Diffeomorphisms of surfaces. Isometries and the intrinsic geometry of a surface. Examples. Developables

Lecture 26 291

The tangential plane and the normal vector. The curvature of a normal section. The second quadratic form of a surface. The indicatrix of Dupin. Principal curvatures. The second quadratic form of a graph. Ruled surfaces of zero curvature. Surfaces of revolution

Lecture 27 310

Weingarten’s derivation formulas. Coefficients of connection. The Gauss theorem. The necessary and sufficient conditions of isometry

Subject Index 346

Posted in books, mathematics, mir books, mir publishers, soviet | Tagged adjoint operators, angles on a surface, annulet, bilinear functionals, Cartan's divisibility theorem, centroaffine transformations, Complexification of a linear operator, conjugate space, Developables, Diffeomorphisms, dual space, eigenfunctions, eigenvalues, euclidean point spaces, euclidean spaces, Frenet’s formulas, gauss theorem, gradients derivatives, graphs of functions, Grassman algebra, Hamilton’s symbolic vector, hyperplanes, hypersurface, indicatrix of dupin, isometries, jacobi theorem, Kronecker-Capelli theorem, linear operators, Matrix rank theorem, Multiplication of tensors, Multivector rank theorem, multivectors, normal vector, Plücker relations, principal curvatures, projections, projective space, quadratic forms, regular surfaces, self-adjoint operators, skew-Hermitian operators., Skew-symmetric Hermitian operators., smooth functions, tangential plane, tensors, three dimensional, Unitary matrices, unitary spaces, vector analysis, vector fields, vector spaces, Vector subspaces, Weingarten's derivation | 2 Comments

Lectures in Geometry – Semester 1 Analytic Geometry – Postnikov

Posted on November 6, 2021 by The Mitr

In this post, we will see the book Lectures in Geometry – Semester 1 Analytic Geometry by M. Postnikov. This book is the first one of a five part Lectures in Geometry series. So far we have volumes 1, 2 and 5, volumes 3 and 4 are missing.

About the book

This textbook comprises lectures read by the author to the first-year students of mathematics at Moscow State University. The book is divided into two parts containing the texts of lectures read in the first and second semesters, respectively. Part One contains 29 lectures and read in the first semester.
The subject matter is presented on the basis of vector axiomatics
of geometry with special emphasis on logical sequence in introduction of the basic geometrical concepts. Systematic exposition and application of bivectors and trivectors enables the author to successfully combine the above course of lectures with the lectures of the following semesters. The book is intended for university undergraduates majoring in mathematics.

The book was translated from Russian by by Vladimir Shokurov and was published in 1982 by Mir.

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Preface to the Russian edition 11
Preface to the English edition 13

Lecture 1 15

The subject-matter of analytic geometry. Vectors. Vector addition. Multiplication of a vector by a number. Vector spaces. Examples. Vector spaces over an arbitrary field

Lecture 2 23

The simplest consequences of the vector space axioms. Independence of the sum of any number of vectors on brackets arrangement. The concept of a family

Lecture 3 28

Linear dependence and linear independence. Linearly independent sets. The simplest properties of linear dependence. Linear-dependence theorem

Lecture 4 35

Collinear vectors. Coplanar vectors. The geometrical meaning of collinearity and coplanarity. Complete families of vectors, bases, dimensionality. Dimensionality axiom. Basis criterion. Coordinates of a vector. Coordinates of the sum of vectors and those of the product of a vector by a number

Lecture 5 43

Isomorphisms of vector spaces. Coordinate isomorphisms. The isomorphism of vector spaces of the same dimension. The method of coordinates. Affine spaces. The isomorphism of affine spaces of the same dimension. Affine coordinates, Straight lines in affine space. Segments –

Lecture 6 54

Parametric equations of a straight line. The equation of a straight line in a plane. The canonical equation of a straight line in a plane. The general equation of a straight line in a plane. Parallel lines. Relative position of two straight lines in a plane. Uniqueness theorem. Position of a straight line relative to coordinate axes. The half-planes into which a straight line divides a plane

Lecture 7 63

An intuitive notion of a bivector. A formal definition of the bivector. The coincidence of the two definitions. A zero bivector. Conditions for the equality of bivectors. Parallelism of the vector and the bivector. The role of the three-dimensionality condition. Addition of bivectors

Lecture 8 71

The correctness of the definition of a bivector sum. The product of a bivector by a number. Algebraic properties of external product. The vector space of bivectors. Bivectors in a plane and the theory of areas. Bivectors in space

Lecture 9 82

Planes in space. Parametric equations of a plane. The general equation of a plane. A plane passing through three noncollinear points

Lecture 10 87

The half-spaces into which a plane divides space. Relative positions of two planes in space. Straight lines in space. A plane containing a given straight line and passing through a given point. Relative positions of a straight line and a plane in space. Relative positions of two straight lines in space. Change from one basis for a vector space to another

Lecture 11 99

Formulas for the transformation of vector coordinates. Formulas for the transformation of the affine coordinates of points. Orientation. Induced orientation of a straight line. Orientation of a straight line given by an equation. Orientation of a plane in space

Lecture 12 112

Deformation of bases. Sameness of the sign bases. Equivalent bases and matrices. The coincidence of deformability with the sameness of sign. Equivalence of linearly independent systems of vectors. Trivectors. The product of a trivector by a number. The external product of three vectors

Lecture 13 123

Trivectors in three-dimensional vector space. Addition of trivectors. The formula for the volume of a parallelepiped. Scalar product. Axioms of scalar multiplication. Euclidean spaces. The length of a vector and the angle between vectors. The Cauchy-Buniakowski inequality. The triangle inequality. Theorem on the diagonals of a parallelogram. Orthogonal vectors and the Pythagorean theorem

Lecture 14 133

Metric form and metric coefficients. The condition of positive definiteness. Formulas for the transformation of metric coefficients when changing a basis. Orthonormal families of vectors and Fourier coefficients. Orthonormal bases and rectangular coordinates. Decomposition of positive definite matrices. The Gram-Schmidt orthogonalization process. Isomorphism of Euclidean spaces. Orthogonal matrices. Second-order orthogonal matrices. Formulas for the transformation of rectangular coordinates

Lecture 15 148

Trivectors in oriented Euclidean space. Triple product of three vectors. The area of a bivector in Euclidean space. A vector complementary to a bivector in oriented Euclidean space. Vector multiplication. Isomorphism of spaces of vectors and bivectors. Expressing a vector product in terms of coordinates. The normal equation of a straight line in the Euclidean plane and the distance between a point and a straight line. Angles between two straight lines in the Euclidean plane

Lecture 16 160

The plane in Euclidean space. The distance from a point to a plane. The angle between two planes, between a straight line and a plane, between two straight lines. The distance from a point to a straight line in space. The distance between two straight lines in space. The equations of the common perpendicular of two skew lines in space ‘

Lecture 17 166

The parabola. The ellipse. The focal and directorial properties of the ellipse. The hyperbola. The focal and directorial properties of the hyperbola

Lecture 18 176

The equations of ellipses, parabolas and hyperbolas referred to a vertex. Polar coordinates. The equations of ellipses, parabolas and hyperbolas in polar coordinates. Affine ellipses, parabolas, hyperbolas. Algebraic curves. Second-degree curves and associated difficulties. Complex affine geometry and its insufficiency

Lecture 19 187

Real-complex vector spaces. Their dimensionality. Isomorphism of real-complex vector spaces. Complexification. Real-complex affine spaces. The complexification of affine spaces. Real-complex Euclidean spaces. Real and imaginary curves of second degree.

Lecture 20 193

Introductory remarks. The centre of a second-degree curve. Centres of symmetry. Central and noncentral curves of second degree. Straight lines of non-asymptotic direction. Tangents. Straight lines of asymptotic direction

Lecture 21 203

Singular and nonsingular directions. Diameters. Diameters and centres. Conjugate directions and conjugate diameters. Simplification of the equation of the second-degree central curve. Necessary refinements. Simplification of the equation of the second-degree noncentral curve

Lecture 22 215

Second-degree curves in the complex aífine plane. Second-degree curves in the real-complex affine plane. The uniqueness of the equation of a second-degree curve. Second-degree curves in the Euclidean plane. Circles

Lecture 23 228

Ellipsoids. Imaginary ellipsoids. Second-de imaginary cones. Hyperboloids of two sheets. Hyperboloids of one sheet. Rectilinear generators of a hyperboloid of one sheet. Second-degree cones. Elliptical paraboloids. Hyperbolic paraboloids. Elliptical cylinders. Other second-degree surfaces. The statement of the classification theorem

Lecture 24 254

Coordinates of a straight line. Pencils of straight lines. Ordinary and ideal pencils. Extended planes. Models of projective-affine geometry

Lecture 25 264

Homogeneous affine coordinates. Equations of straight lines in homogeneous coordinates. Second-degree curves in the projective-affine plane. Circles in the projective-Euclidean real-complex plane. Projective planes. Homogeneous affine coordinates in the bundle of straight lines. Formulas for the transformation of homogeneous affine coordinates. Projective coordinates. Second-degree curves in the projective plane

Lecture 26 274

Coordinate isomorphisms of vector spaces. Coordinate isomorphisms of affine spaces. Projective-affine spaces. Projective spaces. Pencils of planes. Bundles of planes. Extending space with ideal elements. Orthogonal, affine and projective transformations

Lecture 27 288

Expressing an affine transformation in terms of coordinates. Examples of affine transformations. Factorization of affine transformations. Orthogonal transformations. Motions of a plane. Symmetries and glide symmetries. A motion of a plane as a composition of two symmetries. Rotations of a space

Lecture 28 302

The Desargues theorem. The Pappus-Pascal theorem. The Fano theorem. The duality principle. Models of the projective plane. Models of the projective straight line and of the projective space. The complex projective straight line

Lecture 29 315

Linear fractional transformations. Linear transformations. Inversion. Inversions and linear fractional transformations. Two properties of linear fractional transformations. Fixed points of linear fractional transformations. Parabolic, elliptical, hyperbolic and loxodromic linear fractional transformations. The three-point theorem. The multiplier of linear fractional nonparabolic transformation. Classiffcation of linear fractional transformations. Stereographic projection formulas. Rotations of a sphere as linear fractional transformations of a plane. Isometries of a cube

Subject index 341

Posted in books, mathematics, mir books, mir publishers, soviet | Tagged affine transformations, analytic, analytic geometry, bivectors, Cauchy-Buniakowski inequality, collinear, conic sections, coplanar, desargues theorem, duality principle, ellipsoids, Fano theorem, geometry, isomorphisms, linear dependence, linear fractional transformations, mathematics, metric coefficients, metric forms, mir publishers, parametric equations, space, triangle inequality, trivectors, vectors | 1 Comment

Firm-as-a-Rock Soft-as-Silk and Sweet-as-Honey

Posted on November 5, 2021 by The Mitr

In this post, we will see the book Firm As Rock Soft As Silk Sweet As Honey edited by Zdravka Tasheva.

About the book

The book tells us story of a grandma who protects her grandchildren from a hungry, big bad wolf.

The book was translated from Bulgarian by and was published in Sofia press in Bulgaria. The book was illustrated by Gencho Denchev.

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Posted in books, children's books, children's stories, soviet | Tagged bed time stories, children's book, story book, wolf | Leave a comment

The Adventures of Pencil and Screwbot

Posted on November 4, 2021 by The Mitr

In this post, we will see the book The Adventures Of Pencil And Screw Bolt by Yuri Druzhkov.

About the book

Our Dear Little Friends,

In this book you will meet two very outstanding characters. Pencil who is an artist and a real magician, and Screwbolt, a little iron man, who is a very cleaver mechanic. Both are very nice people and we hope you will like them and will want to learn from them.

If so, write to us and tell us how you understood this book and what it has taught you.

We get very many letters from our young readers. The boy wrote “Please tell me where I can learn to draw like Pencil. I would them draw myself a bicycle, a toy gun and a two toy cars.”

And another boy wants to learn to draw for a very different reason: “I want to draw a magic school where all my chums could learn to be magicians. Ans I also want to draw a river by our house so that granny doesn’t have to go far with her washing. She’s old you know.”

Frankly, we like the second letter better. Why do you think?

The book was translated from Russian by Fainna Glagoleva and drawings are by Nikolai Grishin. The book was was published in 1973 by Progress.

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Posted in books, children's books, children's stories, progress publishers, soviet | Tagged children's book, fantasy, illustrated book, progress publishers, robot, soviet, soviet literature, story book | 1 Comment

Random Processes In Electrical And Mechanical Systems – Lebedev

Posted on November 3, 2021 by The Mitr

In this post, we will see the book Random Processes In Electrical And Mechanical Systems by V. L. Lebedev.

About the book

This book deals with stationary and non-stationary random processes in linear systems and in inertialess nonlinear systems which have either one or several inputs and outputs. The application of the mathematical methods expounded is illustrated by many practical examples related to various physical and engineering problems.

The book was translated from Russian by J. Flancreich and M. Segal and was published in 1961 by The Israel Program for Scientific Translations.

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Preface 1

Chapter One. GENERAL CONCEPTS OF RANDOM PROCESSES 3

§ 1. Dynamical and statistical laws 3
§ 2. Random processes 5
§ 3. The role of the theory of random processes in engineering 6

Chapter Two. RANDOM FUNCTIONS AND THEIR LINEAR TRANSFORMATIONS 8

§ 4. The concept of random function 8
§ 5. Stationary and nonstationary random functions 9
§ 6. Moments 9
§ 7. The derivative of a random function 14
§ 8. Integral transformations of random functions 18
§ 9. A set of several integral transformations of the random function 20
§ 10. Linear transformations of random functions 21

Chapter Three. RANDOM FORCES UPON A LINEAR SYSTEM WITH LUMPED CONSTANTS 24

§ 11. Statement of the problem and terminology 24
§ 12. The method of stochastic differential equations 25
§ 13. The method of impulse characteristics 28
§ 14. The spectral method 32
§ 15. An RC circuit excited by a stationary fluctuating voltage 42
§ 16. Uncorrelated input 47
§ 17. The problem of two RC-circuits with a common input 50
§ 18. The problem of two RC-circuits with a common output 53

Chapter Four. SOME LINEAR PROBLEMS IN THE THEORY OF
RANDOM PROCESSES 57

§ 19. One-dimensional Brownian motion 57
§ 20. Thermal noise in electric circuits 59
§ 21. Thermal noise in an electrical oscillation circuit 61
§ 22. Thermal motion of a galvanometer 64
§ 23. The passage of irregular telegraph signals through a linear filter 69
§ 24. The optimal filter problem 73
§ 25. Elements of the theory of potential-noise stability 79

Chapter Five. RANDOM FORCE ON A NONLINEAR SYSTEM

§ 26. Simplest problem of random force on an inertialess
nonlinear system
§ 27. The general problem of random force on an inertialess
nonlinear system
§ 28. Random process in inertial nonlinear systems

Chapter Six. SOME NONLINEAR PROBLEMS IN THE THEORY
OF RANDOM PROCESSES 93

§ 29. Action of fluctuation noise on a detector with exponential
characteristic 93
§ 30. Statistical properties of the noise voltage envelope at the output of a selective system 96
§ 31. Statistical properties of the phase of a noise voltage at the output of a selective system 104
§ 32. Statistical dependence between envelopes of noise
voltages at the outputs of two selective four-poles with their inputs connected in parallel 108
§ 33. Statistical properties of the voltage envelope at the
output of a selective system under action of non-modulated signal and fluctuation noise 112
§ 34. Statistical properties of the voltage phase at the output
of a selective system under action of a nor modulated
signal and fluctuation noise 115
§ 35. Computation of the detector output for given statistical
properties of the applied voltage envelope 116

Bibliography 119

Posted in books, electronics, engineering, mathematics, physics, soviet, technology | Tagged brownian motion, Derivatives, detectors, electrical systems, engineering, filters, inertial nonlinear systems, inertialess nonlinear system, linear systems, mechanical systems, moments, noise, non-linear problems, physics, properties, random force, random functions, random processes, soviet, spectral method, statistical properties, theory, thermal noise, transformations, voltage noise | 1 Comment

Foundations Of One Electron Theory Of Solids – Yatrebov, Katsnelson.

Posted on November 2, 2021 by The Mitr

In this post, we will see the book Foundations Of One Electron Theory Of Solids by L. I. Yatrebov and A. A. Katsnelson.

About the book

The book was translated from Russian by and was published in .

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Preface 7

Introduction 11

Chapter 1. Principles of the one-electron theory

Part 1 Theoretical principles of the pseudopotential method

Chapter 2. Scattering theory for “solid-state people”

2.1. Mathematical formalism 23
2.2. Scattering on an isolated potential 31
2.3. Pseudism and scattering 46
2.4. Bound states, pseudopotentials and the convergence of series 54
2.5. Scattering theory and potential form factors 61

Chapter 3. Theory of potential

3.1. Potential seen by an atomic electron 69
3.2. Dielectric screening 83
3.3. The self-consistency of pseudopotential and additive screening 99
3.4. Muffin-tin potential 107
3.5. Average value of the screened potential 124

Chapter 4. Theory of pseudopotential form factors

4.1. Nonlocality, the energy dependence of form factors and perturbation theory 132
4.2. The OPW formfactor 144
4.3. Phase-shift form factors 157
4.4. Effective medium and pseudopotential form factors 173

Chapter 5. Pseudism and the secular equations of band theory

5.1. The Green’s function (or KKR) method 181
5.2. Pseudopotential secular equations 196

Part 2 The use of pseudopotential theory for crystal-structure calculations

Chapter 6. Formalism of crystal-structure energy calculations

6.1. Basic assumptions 205
6.2. Band structure energy of pure metals and binary alloys 205
6.3. Electrostatic energy 223
6.4. The total internal energy of an alloy: second-order perturbation theory and the locality approximation 227
6.5. Higher-order perturbation analysis 232
6.6. OPW nonlocal alloy theory 236

Chapter 7. Pseudopotential theory of alloys. Structure stability application

7.1. Phase boundaries in terms of pseudopotential theory 241
7.2. Ordered phases, their structures, and existence conditions 245
7.3. Short-range order problems 256
7.4. Crystal structure stability in the OPW approach 261

Chapter 8. Pseudopotential theory and imperfections in crystals

8.1. Introductory remarks 267
8.2. Crystal lattice vibrations 267
8.3. Static imperfections 279

Chapter 9. Principles of pseudopotential calculations of the properties of metals

9.1. Genera 287
9.2. Calculation of the atomic properties of crystalline metals and alloys 287
9.3. Transport properties of noncrystalline metals and alloys 297

References 317

Index 331

Posted in books, metals, mir books, mir publishers, physics, soviet | Tagged alloys, atoms, crystal structure, crystals, green's function, imperfections, lattice vibrations, mir publishers, models, nearly free electron model, OPW approach, perturbation theory, physics, potential, pseudism, pseudo-potential, quantum mechanics, scattering theory, solid state physics, solids, stability | 1 Comment

The Night After – Climatic and Biological Consequences of a Nuclear War – Scientists’ Warning – Velikhov (Ed.)

Posted on November 1, 2021 by The Mitr

In this post, we will see the book The Night After – Climatic and Biological Consequences of a Nuclear War – Scientists’ Warning edited by Yevgeni Velikhov, Vice President USSR Academy of Sciences.

About the book

One cannot overestimate the sensational impacts of the conclusion of prominent Soviet scientists based on their investigations into the long term Global after-effects of a nucLear war. Their results were completely consistent with the data obtained vt American scientists, even though they used different research programs and methodologies. Leading Soviet and American Scientists delivered their grim and disturbing message at international conferences held in Moscow and Washington, and at a Seminar at the Pontifical Academy of Sciences in the Vatican in January 1984.
The scientists conclusion is clear and unambiguous: the use of even a fraction of the nuclear arsenal that exists in the world today would result in a nuclear night and a nuclear winter which would ultimately cause unprecedented global ecological disaster. Such atmospheric bomb would mean extermination of all living things on Earth.
This book covers the main research on the subject by Soviet scientists conducted under the auspices of the Soviet Scientists Committee for the Defence of Peace Against Nuclear threat.
The leading Soviet scientists, contributors to this collection, described in a popular manner, but on a highly scientific level the essence of those vital investigations which may well become the turning point in this extremely dangerous and senseless nuclear arms race.

The Soviet Scientists Committee for the Defence of Peace Against Nuclear Threat is a public organization of Soviet scientists formed in May 1983. The Committee consists of 25 members, including Members and Corresponding Members of the USSR Academy of Sciences, and world-renowned specialists from various fields—physics, biology, medicine. politics, economy, etc. The Committees main objective is to conduct scientific research of complex, interdisciplinary problems, bearing directly on the most important task facing mankind today: the preservation of peace and the prevention of a nuclear catastrophe. One of the most important areas of research conducted under the aegis of the Committee is the study of long-term world wide consequences of a nuclear war.

The book was translated from Russian by Anatoli Rosenzweig,
Yuri Taube and compiled by Boris Gontarev. The book was designed by Maxim Zhukov Diagrams by Sergei Stulov and was published in 1985 by Mir.

The cover of the book is an interesting design. It features Albrecht Dürer’s woodcut Die vier apokalyptischen Reiter (‘The four horsemen of the Apocalypse’) and Alexei Venetsianov oil painting Na zhatve.Leto. (‘The Harvest Summer’)

You can get the book here.

archiveorg velikhov-ed.-the-night-after… width=560 height=384 frameborder=0 webkitallowfullscreen=true mozallowfullscreen=true]

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Contributors

Anatoli Alexandrov

Agadzhan Babayev

Aleksandr Bayev

Nikolai Blokhin Nikolai Bochkov

Lev Feoktistov

Aleksandr Ginsburg

Georgi Golitsyn

Anatoli Gromyko

Yuri Izrael

Aleksandr Obukhov

Georgi Stenchikov

Acknowledgements

Introduction by Yevgeni Velikhov

Part One Long-term worldwide consequences of a nuclear war

37 Yuri Izrael
Changes in the atmosphere due to a nuclear war

53 Georgi Stenchikov
Climatic consequences of nuclear war: CCAS Model

83 Georgi Golitsyn , Aleksandr Ginsburg
Natural analogs of a nuclear catastrophe

99 Aleksandr Bayev, Nikolai Bochkov
Medical consequences of a nuclear war

113 Anatoli Gromyko
Ecological disaster: Impact on the Third World

Part Two Abstracts from the reports at the National Scientists’ Conference to Save the World from the Threat of Nuclear War and to Ensure Disarmament and Peace Moscow, May 17-19, 1983

139 Anatoli Alexandrov
Lessons of the past and the main task of the present

143 Nikolai Blokhin
A real threat to the existence of mankind

145 Aleksandr Obukhov
The Earth’s atmosphere: Catastrophe after a nuclear strike

147 Lev Feoktistov
Nuclear weapons: Super-dangerous factor

149 Agadzhan Babayev
Will our planet becomeac a radioactive desert?

Supplement
Scientists’ Appeals and other relevant documents on the prevention of nuclear war

153 Appeal to the Second Special Session of the General Assembly of the United Nations on Disarmament by the Presidium of the USSR Academy of
Sciences. Moscow, May 13, 1982

154 Pugwash Declaration on its 25th anniversary. Warsaw,
August 26-31, 1982

155 Declaration on Prevention of Nuclear War by an Assembly of Presidents of scientific academies and other scientists from all over the world, convened by the Pontifical Academy of Sciences. Vatican, September 23-24, 1982

158 Appeal to all scientists of the world by Soviet scientists’. Moscow,
April 10, 1983

159 Appeal of the National Scientists’ Conference to Save the World from the Threat of Nuclear War and to Ensure Disarmament and Peace. Moscow,
May 17-19, 1983

161 Appeal to the Chairman of the Presidium of the USSR Supreme Soviet, Yuri Andropov, and to the President of the United States, Ronald Reagan, by the Third Congress of International Physicians for the Prevention of Nuclear War. The Hague, June 17-21, 1983

162 The International Physicians’ call for an end to the nuclear arms race by the Third Congress of International Physicians for the Prevention of Nuclear War. The Hague, June 17-21, 1983

163 Physicians’ Oaths and Statements of Medical Ethics: a Proposed Adaptation for the Nuclear Age, by the Third Congress of International Physicians for the Prevention of Nuclear War. The Hague, June 17-21, 1983

163 Nuclear winter: A warning. Information Paper of an Assembly of Presidents of scientific academies and other scientists from all over the world, convened by the Pontifical Academy of Sciences. Vatican, January 23-24-25, 1984

164 Nuclear war: Its consequences and prevention. A statement from a Conference of scientists and religious leaders. Bellagio, Italy, November 23, 1984

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