A Course on Mathematical Analysis – Khinchin

In this post, we will see the book A Course on Mathematical Analysis by  A. Ya. Khinchin.

About the book

This course of mathematical analysis is a text-book for students of mechanico-mathematicaland physico-mathematical faculties of our universities (and to some extent of pedagogical institutes as well) ; it is intended as the main text-book in the study of a science which appears in the curriculum under the heading of mathematical analysis and which deals with the theory of limits, infinite series and differential calculus with simple applications of these subjects.

The book was translated from Russian was published in 1957.

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Contents

Chapter 1. FUNCTIONS 1

§ 1. Variables 1
§ 2. Functions 3
§ 3. The region of definition of a function 6
§ 4. Functions and formulae 7
§ 5. The geometrical representation of functions 11
§ 6. Elementary functions 13

Chapter 2. ELEMENTARY THEORY OF LIMITS 18

§ 7. Infinitesimal quantities 18
§ 8. Operations with infinitesimal quantities 23
§ 9. Infinitely large quantities 26
§ 10. Quantities which tend to limits 29
§ 11. Operations with quantities which tend to limits 33
§ 12. Infinitesimal and infinitely large quantities of different orders 39

Chapter 3. THE DEVELOPMENT OF THE ACCURATE THEORY OF LIMIT TRANSITION 45

§ 13. The mathematical definition of a process 45
§ 14. The accurate concept of limits 47
§ 15. The development of the concept of limit transitions 52

Chapter 4. REAL NUMBERS 56

§ 16. Necessity of producing a general theory of real numbers 56
§ 17. Construction of a continuum 59
§ 18. Fundamental lemmas 69
§ 19. Final points in connection with the theory of limits 74

Chapter 5. CONTINUOUS FUNCTIONS 79

§ 20. Definition of continuity 79
§ 21. Operations with continuous functions 84
§ 22. Continuity of a composite function 85
§ 23. Fundamental properties of continuous functions 87
§ 24. Continuity of elementary functions 94

Chapter 6. DERIVATIVES 98

§ 25. Uniform and non-uniform variation of functions 98
§ 26. Instantaneous velocity of non-uniform movement 101
§ 27. Local density of a heterogeneous rod 106
§ 28. Definition of a derivative 108
§ 29. Laws of differentiation 110
§ 30. The existence of functions and their geometrical illustration 123

Chapter 7. DIFFERENTIALS 128

§ 31. Definition and relationship with derivatives 128
§ 32. Geometrical illustration and laws for evaluation 132
§ 33. Invariant character of the relationship between a derivative and a differential 134

Chapter 8. DERIVATIVES AND DIFFERENTIALS OF HIGHER ORDERS 136

§ 34. Derivatives of higher orders 136
§ 35. Differentials of higher orders and their relationship with derivatives 139

Chapter 9. MEAN VALUE THEOREMS 142

§ 36. Theorem on finite increments 142
§ 37. Evaluation of limits of ratios of infinitely small and infinitely large quantities 147
§ 38. Taylor’s formula 154
§ 39. The last term in Taylor’s formula 158

Chapter 10. APPLICATION OF DIFFERENTIAL CALCULUS TO ANALYSIS OF FUNCTIONS 164

§ 40. Increasing and decreasing of functions 164
§ 4l. Extrema 167

Chapter 11. INVERSE OF DIFFERENTIATION 175

§ 42. Concept of primitives 175
§ 43. Simple general methods of integration 182

Chapter 12. INTEGRAL 193

§ 44. Area of a curvilinear trapezium 193
§ 45. Work of a variable force 198
§ 46. General concept of an integral 201
§ 47. Upper and lower sums 204
§ 48. Integreability of functions 207

Chapter 13. RELATIONSHIP BETWEEN AN INTEGRAL AND A PRIMITIVE 213

§ 49. Simple properties of integrals 213
§ 50. Relationship between an integral and a primitive 218
§ 51. Further properties of integrals 223

Chapter 14. THE GEOMETRICAL AND MECHANICAL APPLICATIONS OF INTEGRALS 230

§ 52. Length of an arc of a plane curve 230
§ 53. Lengths of arcs of curves in space 241
§ 54. Mass, centre of gravity and moments of inertia of a material plane curve 242
§ 55. Capacities of geometrical bodies 247

Chapter 15. APPROXIMATE EVALUATION OF INTEGRALS 254

§ 56. Problematic set up 254
§ 57. Method of trapeziums 257
§ 58. Method of parabolas 262

Chapter 16. INTEGRATION OF RATIONAL FUNCTIONS 265

§ 59. Algebraical introduction 265
§ 60. Integration of simple fractions 274
§ 61. Ostrogradskij’s method 277

Chapter 17. INTEGRATION OF THE SIMPLE RATIONAL AND TRANSCENDENTAL FUNCTIONS 282

§ 62. Integration of functions of the type R(x,\sqrt[n]{\frac{ax+b}{cx+d}}) 282
§ 63. Integration of functions of the type R (x, \sqrt{ax^{2}+ bx +c}) 284
§ 64. Primitives of binomial differentials 287
§ 65. Integration of trigonometrical differentials 289
§ 66. Integration of differentials containing exponential
functions 294

Chapter 18. NUMERICAL INFINITE SERIES 297

§ 67. Fundamental concepts 297
§ 68. Series with constant signs 305
§ 69. Series with variable signs 316
§ 70. Operations with series 320
§ 71. Infinite products 326

Chapter 19. INFINITE SERIES OF FUNCTIONS 333

§ 72. Region of convergence of a series of functions 333
§ 73. Uniform convergence 335
§ 74. The continuity of the sum of a functional series 340
§ 75. Term-by-term integration and differentiation of series 344

Chapter 20 POWER SERIES AND SERIES OF POLYNOMIALS 351

§ 76. Region of convergence of a power series 351
§ 77. Uniform convergence and its consequences 357
§ 78. Expansion of functions into power series 361
§ 79. Series of polynomials 369
§ 80. Theorem of Weierstrass 372

Chapter 21. TRIGONOMETRICAL SERIES 377

§ 81. Fourier coefficients 377
§ 82. Average approximation 383
§ 83. Dirichlet-Liapunov theorem on closed trigonometrical systems 388
§ 84. Convergence of Fourier series 394
§ 85. Generalised trigonometrical series 396

Chapter 22. DIFFERENTIATION OF FUNCTIONS OF SEVERAL VARIABLES 400

§ 86. Continuity of functions of several independent variables 400
§ 87. Two-dimensional continuum 403
§ 88. Properties of continuous functions 408
§ 89. Partial derivatives 410
§ 90. Differentials 413
§ 91. Derivatives in arbitrary directions 419
§ 92. Differentiation of composite and implicit functions 422
§ 93. Homogeneous functions and Euler theorem 427
§ 94. Partial derivatives of higher orders 429
§ 95. Taylor’s formula for functions of two variables 433
§ 96. Extrema 438

Chapter 23. SOME SIMPLE GEOMETRICAL APPLICATIONS OF DIFFERENTIAL CALCULUS 443

§ 97. Equations of tangent and normal to a plane curve 443
§ 98. Tangential line and normal plane to a curve in space 446
§ 99. Tangential and normal planes to a surface 448
§ 100. Direction of convexity and concavity of a curve 451
§ 101. Curvature of a plane curve 453
§ 102. Tangential circle 458

Chapter 24. IMPLICIT FUNCTIONS 462

§ 103. The simplest problem 462
§ 104. The general problem 469
§ 105. Ostrogradskij’s determinant 475
§ 106. Conditional extremum 483

Chapter 25. GENERALISED INTEGRALS 491

§ 107. Integrals with infinite limits 491
§ 108. Integrals of unbounded functions 504

Chapter 26. INTEGRALS OF PARAMETRIC FUNCTIONS 514

§ 109. Integrals with finite limits 514
§ 110. Integrals with infinite limits 526
§ 111. Examples 535
§ 112. Euler’s integrals 541
§ 113. Stirling’s formula 548

Chapter 27. DOUBLE AND TRIPLE INTEGRALS 557

§ 114. Measurable plane figures 557
§ 115. Volumes of cylindrical bodies 567
§ 116. Double integral 571
§ 117. Evaluation of double integrals by means of two simple integrations 576
§ 118. Substitution of variables in double integrals 584
§ 119. Triple integrals 590
§ 120. Applications 593

Chapter 28. CURVILINEAR INTEGRALS 602

§ 121. Definition of a plane curvilinear integral 602
§ 122. Wark of a plane field of force 610
§ 123. Green’s formula 612
§ 124, Application to differentials of functions of two variables 617
§ 125. Curvilinear integrals in space 622

Chapter 29. SURFACE INTEGRALS 626

§ 126. The simplest case 626
§ 127. General definition of surface integrals 630
§ 128. Ostrogradskij’s formula 637
§ 129. Stoke’s formula 642
§ 130. Elements of the field theory 647

CONCLUSION – Short historical sketch 653

INDEX 665

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A Course of Higher Mathematics (Vols. 1 – 5) – Smirnov

In this post, we will see the six volume A Course of Higher Mathematics by V. I. Smirnov.

About the Course

Volume I Elementary Calculus is primarily concerned with differential and integral calculus. Particular emphasis is given to functional relationships in the theory of limits. The book also treats series, functions of several variables and complex numbers.

Volume 2 Advanced Calculus: This volume is primarily concerned with advanced calculus. Covered are ordinary differential equations, linear differential equations, multiple and line integrals, vector analysis and field theory, and the mathematics necessary for the discussion of problems in classical field theory.

Volume 3, Part 1 Linear Algebra: The first part of Volume III gives a full account of the two branches of modern algebra — linear algebra and the theory of groups —which are most frequently used in theoretical physics.

Volume 3, Part II Complex Variables – Special Functions: The second part of Volume III is primarily concerned with the theory of complex variables. It presents a complete picture of the aspects of the theory which are of most direct interest to applied mathematicians.

Volume 4 Integral and Partial Differential Equations: This volume begins with full accounts of the theory of integral equations and with the calculus of variations. Included are the fundamental theory of partial differential equations and systems of equations in which characteristics plays a central role.

Volume 5 Integration and Functional Analysis: The final volume presents the theory of integration and elements of functional analysis. Although functional analysis has become a very abstract discipline, its general results can be used to derive the solution of particular problems in classical analysis and in applied mathematics.

The course was translated by D. E. Brown and edited by I. N. Sneddon and was first published in 1964.

Credits to the Original uploaders.

Volume 1 here.

Volume 2 here.

Volume 3 Part 1 here.

Volume 3 Part 2 here.

Volume 4 here.

Volume 5 here.

 

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Happy New Year and 2021 in Review

Happy New Year to All!

Hope this year is better than the last,

The last one went on very very fast..

Thank you for being with us over the years!

Here are some stats from the last year and resolutions for the next..

Views and Visitors

We had a little over 300,000 views this year with about 64 k unique visitors.

Places

As for the reach except for a few countries mostly from central-western Africa, we have covered almost all the globe. Of course most of our visitors are from India, but I am happy that we reached out to these many places and people!

 

Posts

For almost last three months or so, we have made at least one post a day – hope we are able to continue this next year too.

Resolutions

  1. to try to post at least one post a day for every day of the new year – we do have enough books to do this!
  2. There are about 250 books to be scanned, will try to finish in a workshop mode with some friends – will keep you posted.
  3. Get the printing of books done – I am guilty for this to happen, we had made the post  regarding printing last April and its still in production hell (as they call it). We hope to sort this one out before this April (Keep fingers crossed).
  4. Create LaTeX versions of more books ( a few are in pipeline) will keep you posted.
  5. Purchase new physical copies (getting rarer by the day). We might need your help in this – will post updates later.

Anyways hoping that this year is good for all of us!

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Continued Fractions – Khinchin

In this post, we will see the book Continued Fractions by A. Ya. Khinchin.

About the book

The late Alexander J. Khinchin was born in Russia in 1894. One of the founders of the Soviet school of probability theory, Khinchin was made a full professor at Moscow University in 1922 and held that position until his death. His teaching skill is discernible in the clear and straightforward presentation of his subject. Designed for use as an expository text in the university curriculum, the book is basically of an elementary nature, the author confining his attention to continued fractions with positive-integral elements. The essentials needed for applications in probability theory, mechanics, and, especially, number theory are given and the real number system is constructed from continued fractions. The last chapter is somewhat more advanced and deals with the metric, or probability, theory of continued fractions. This first English translation is based on the third edition of the text which was issued in 1961.

The book was translated from Russian by Scripta Technica and was published in 1964.

Credits to original uploader.

You can get the book here.

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Contents

Chapter I. Properties of the Apparatus 1

1. Introduction 1
2. Convergents 3
3. Infinite continued fractions 8
4. Continued fractions with natural elements 12

Chapter II. The Representation of Numbers by Continued Fractions 16

5. Continued fractions as an apparatus for representing real numbers 16
6. Convergents as best approximations 20
7. The order of approximation 28
8. General approximation theorems 34
9. The approximation of algebraic irrational numbers and Liouville’s transcendental numbers 45
10. Quadratic irrational numbers and periodic continued fractions 47

Chapter III. The Measure Theory of Continued Fractions 51

11. Introduction 51
12. The elements as functions of the number represented 52
13. Measure-theoretic evaluation of the increase in the elements 60
14. Measure-theoretic evaluation of the increase in the denominators of the convergents. The fundamental theorem of the measure theory of approximation 65
15. Gauss’s problem and Kuz’min’s theorem 71
16. Average values 86
95 Index

 

 

 

 

 

 

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The Fox Plays The Bear A Trick – Creanga

In this post, we will see the book The Fox Plays The Bear A Trick by Ion Creanga.

The Angry Bear

The Sly Fox

 

About the book

This little book will tell you the story of a sly fox who tricks a big angry bear!

The book was translated from Moldovian by D. Melenchuk and was illustrated by W. Brinzey. The book was published by Kishinev Literatura Artistica, Moldova in 1983. A detailed review can be found here.

All credits to Guptaji.

You can get the book here (cleaned) and here.

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Please do help if you can!

Internet Archive Needs Your Help!

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Melasia And The Bear by Marko Vovchok

In this post, we will see the book Melasia And The Bear by Marko Vovchok.

About the book

This little book tells us the story of a little brave girl Melasia who faces a bear alone!

The book was translated from Russian by Mary Skrypnyk and was illustrated by Valentine Ulyanova. The book was published  by Veselka Publishers, Kiev in 1980.

All credits to Guptaji.

You can get the book here (cleaned) and here.

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The Three Bears – Tolstoy

In this post, we will see the book The Three Bears by Leo Tolstoy.

About the book

In this little book a family of bears, father bear, mother bear and little bear Misha, find a little girl in their home. The little girl has drank their soup, broken their chair and sleeping in their beds. What will the bear family do?

This is Tolstoy’s version for “Goldilocks and the Three Bears”.The girl intruder is not named, and has been interpreted as a Napoleon figure, invading and wrecking the home of the good Russian bears, but ultimately being beaten back as Napoleon was in 1812. The story was also popular in Soviet times where mistrust of outsiders was encouraged. Source

The book was translated from Russian by Iyv Litvinov and was illustrated by Yuri Vasnetsov. The book was printed several times, the current scan is for the 1989 print by Raduga Publishers.

All credits to Guptaji.

You can get the book here (cleaned) and here.

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Mathematical Foundations of Information Theory – Khinchin

In this post, we will see the book Mathematical foundations of Information Theory by A. I. Khinchin.

About the book

The book is a translation of two papers written by the Russian mathematician, A. I. Khinchin, for the expository journal Uspekhi. These papers present the mathematical foundations of information theory. While completely rigorous, the flavour of the engineering applications which led to the theory runs throughout and very much helps the intuition. Khinchin has here reformulated basic concepts and presents for the first time rigorous proofs of certain fundamental theorems in the subject.

The first paper discusses the concept of entropy and gives one major application to coding. The only stochastic processes used are Markov chains. This paper would serve as a valuable supplement to an introductory probability course.

The second and longer paper uses more advanced topics from probability theory, for example, stationary processes and martingales. However, the treatment is quite complete and the non specialist would not suffer thanks to Khinchin’s amazing expository ability. It is a tribute to Shannon’s theory that a rigorous treatment only enhances the elegance of the basic theorems.

The book was translated from Russian by R. A. Silverman  and M. D. Friedman was published in  1957.

Credits to original uploader.

You can get the book here.

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Contents

 

The Entropy Concept in Probability Theory

# 1. Entropy of Finite Schemes 2

# 2. The Uniqueness Theorem 9

# 3. Entropy of Markov chains 13

# 4. Fundamental Theorems 16

#5. Application to Coding Theory 23

On the Fundamental Theorems of Information Theory

INTRODUCTION: 30

CHAPTER I. Elementary Inequalities 34

# 1. Two generalizations of Shannon’s inequality 34

# 2. Three inequalities of Feinstein 39

CHAPTER II. Ergodic Sources 44

# 3. Concept of a source. Stationarity. Entropy. 44

# 4. Ergodic Sources 49

#5. The E property. McMillan’s theorem. 54

# 6. The martingale concept. Doob’s theorem. 58

% 7. Auxiliary propositions 64

# 8. Proof of McMillan’s theorem 70

CHAPTER III. Channels and the sources driving them 75

# 9. Concept of channel. Noise. Stationarity. Anticipation 75

#10. Connection of the channel to the source 78

#11. The ergodic case 85

CHAPTER IV. Feinstein’s Fundamental Lemma 90

#12. Formulation of the problem 90

#13. Proof of the lemma 93

CHAPTER V. Shannon’s Theorems 102

# 14. Coding 102

# 15. The first Shannon theorem 104

#16. The second Shannon theorem 109

CONCLUSION 111

REFERENCES 120

 

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Mathematical Foundations of Statistical Mechanics – Khinchin

In this post, we will see the book Mathematical Foundations of Statistical Mechanics by A. I. Khinchin.

About the book

The present book considers as its main task to make the reader familiar with the mathematical treatment of statistical mechanics on the basis of modern concepts of the theory of probability and a maximum utilization of its analytic apparatus. The book is written, above all, for the mathematician, and its purpose is to introduce him to the problems of statistical mechanics in an atmosphere of logical precision, outside of which he cannot assimilate and work, and which, unfortunately, is lacking in the existing physical expositions.
The only essentially new material in this book consists in the systematic use of limit theorems of the theory of probability for rigorous proofs of asymptotic formulas without any special analytic apparatus. The few existing expositions which intended to give a rigorous proof to these formulas, were forced to use for this purpose special, rather cumbersome, mathematical machinery. We hope, however, that our exposition of several other questions (the ergodic problem, properties of entropy, intramolecular correlation, etc.) can claim to be new to a certain extent, at least in some of its parts.

The book was translated from Russian by George Gamow was first published in 1949.

Credits to original uploader.

You can get the book here.

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Contents

Preface vii

Chapter I. Introduction

1. A brief historical sketch 1
2. Methodological characterization 7

Chapter II. Geometry and Kinematics of the Phase Space

3. The phase space of a mechanical system 13
4. Theorem of Liouville 15
5. Theorem of Birkhoff 19
6. Case of metric indecomposability 28
7. Structure functions 32
8. Components of mechanical systems 38

Chapter III. Ergodic Problem

9. Interpretation of physical quantities in statistical mechanics 44
10. Fixed and free integrals 47
11. Brief historical sketch 52
12. On metric indecomposability of reduced manifolds 55
13. The possibility of a formulation without the use of metric indecomposability 62

Chapter IV. Reduction to the Problem of the Theory of
Probability

14. Fundamental distribution law 70
15. The distribution law of a component and its energy 71
16. Generating functions 76
17. Conjugate distribution functions 79
18. Systems consisting of a large number of components 81

Chapter V. Application of the Central Limit Theorem

19. Approximate expressions of structure functions 84
20. The small component and its energy. Boltzmann’s law 88
21. Mean values of the sum functions 93
22. Energy distribution law of the large component 99
23. Example of monatomic ideal gas 100
24. The theorem of equipartition of energy 104
25. A system in thermal equilibrium. Canonical distribution of Gibbs 110

Chapter VI. Ideal Monatomic Gas

26. Velocity distribution. Maxwell’s law 115
27. The gas pressure 116
28. Physical interpretation of the parameter 121
29. Gas pressure in an arbitrary field of force 123

Chapter VII. The Foundation of Thermodynamics

30. External parameters and the mean values of external forces 129
31. The volume of the gas as an external parameter 131
32. The second law of thermodynamics 132
33. The properties of entropy 137
34. Other thermodynamical functions 145

Chapter VIII. Dispersion and the Distributions of Sum Functions

35. The inter molecular correlation 148
36. Dispersion and distribution laws of the sum functions 156

Appendix

The proof of the central limit theorem of the theory of probability 166

Notations 176

Index 178

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