Free Mathematics Books

Here is an unordered list of online mathematics books, textbooks, monographs, lecture notes, and other mathematics related documents freely available on the web. I tried to select only the works in book formats, "real" books that are mainly in PDF format, so many well-known html-based mathematics web pages and online tutorials are left out. Click here if you prefer a categorized directory of mathematics books. The list is updated on a daily basis, so, if you want to bookmark this page, use one of the buttons below.

1. Handbook of Mathematics for Engineers
   E. V. Huntington, L. A. Fischer | McGraw Hill, Published in 1918, 212 pages
2. Operator Algebras and Quantum Statistical Mechanics
   Ola Bratteli, Derek W. Robinson | Springer, Published in 2003, 505 pages
3. Understanding Algebra
   James W. Brennan | , Published in 2011, 106 pages
4. Elementary Differential Geometry
   Gilbert Weinstein | UAB, Published in 2009, 62 pages
5. Mathematical Reasoning: Writing and Proof
   Ted Sundstrom | Pearson Education, Inc., Published in 2013, 591 pages
6. Introduction to Numerical Methods
   Jeffrey R. Chasnov | The Hong Kong University, Published in 2012, 63 pages
7. A First Course in Complex Analysis
   M. Beck, G. Marchesi, D. Pixton | San Francisco State University, Published in 2012, 127 pages
8. Lectures on Topics in Mean Periodic Functions and the Two-Radius Theorem
   J. Delsarte | Tata Institute of Fundamental Research, Published in 1961, 151 pages
9. Real Functions in One Variable: Calculus 1a
   Leif Mejlbro | BookBoon, Published in 2006, 146 pages
10. Mathematical Logic
    Stephen G. Simpson | Pennsylvania State University, Published in 2013, 128 pages
11. Applied Finite Mathematics
    Rupinder Sekhon | Connexions, Published in 2011, 347 pages
12. Calculus Made Easy
    Silvanus P. Thompson | The MacMillan Company, Published in 1914, 315 pages
13. A Course in Riemannian Geometry
    David R. Wilkins | Trinity College, Dublin, Published in 2005, 72 pages
14. Plane Geometry
    George Wentworth, David E. Smith | Ginn and Company, Published in 1913, 304 pages
15. Elementary Abstract Algebra: Examples and Applications
    Justin Hill, Chris Thron | Texas A&M University, Published in 2017, 785 pages
16. Lectures on Topics in Analysis
    Raghavan Narasimhan | Tata Institute of Fundamental Research, Published in 1965, 205 pages
17. Introduction to Projective Varieties
    Enrique Arrondo | Universidad Complutense de Madrid, Published in 2007, 142 pages
18. An Inquiry-Based Introduction to Proofs
    Jim Hefferon | Saint Michael's College, Published in 2013, 23 pages
19. The Calculus for Engineers and Physicists
    Robert H. Smith | Griffin, Published in 1908, 268 pages
20. Introduction to Arithmetic Groups
    Dave Witte Morris | arXiv, Published in 2015, 491 pages
21. An Introduction to Asymptotic Analysis
    Simon J.A. Malham | Heriot-Watt University, Published in 2010, 56 pages
22. Introduction to Infinitesimal Analysis: Functions of One Real Variable
    N. J. Lennes | John Wiley & Sons, Published in 1907, 225 pages
23. Linearization via the Lie Derivative
    Carmen Chicone, Richard Swanson | American Mathematical Society, Published in 2000, 64 pages
24. Real Analysis
    A. M. Bruckner, J. B. Bruckner, B. S. Thomson | Prentice Hall, Published in 1997, 713 pages
25. Algebra: Abstract and Concrete
    Frederick M. Goodman | Semisimple Press, Published in 2015, 587 pages
26. Lectures on Potential Theory
    M. Brelot | Tata Institute of Fundamental Research, Published in 1967, 158 pages
27. Elementary Theory of Numbers
    Waclaw Sierpinski | ICM, Published in 1964, 516 pages
28. Galois Groups and Fundamental Groups
    David Meredith | San Francisco State University, Published in 1999, 89 pages
29. How We Got From There to Here: A Story of Real Analysis
    Robert Rogers, Eugene Boman | Open SUNY Textbooks, Published in 2013, 210 pages
30. Advanced Algebra
    Herbert E. Hawkes | Ginn and Company, Published in 1905, 314 pages
31. Theory of Functions of a Complex Variable
    Andrew Russell Forsyth | Cambridge University Press, Published in 1918, 892 pages
32. Finite Group Schemes
    Richard Pink | ETH Zurich, Published in 2005, 78 pages
33. Beyond partial differential equations: A course on linear and quasi-linear abstract hyperbolic evolution equations
    Horst R. Beyer | arXiv, Published in 2011, 275 pages
34. The Theory of Numbers
    R. D. Carmichael | John Wiley & Sons, Published in 1914, 85 pages
35. Lie Groups in Physics
    G. 't Hooft, M. J. G. Veltman | Utrecht University, Published in 2007, 75 pages
36. Linear Algebra
    Peter Petersen | UCLA, Published in 2007, 300 pages
37. Contributions to Fourier Analysis
    A. Zygmund, et al. | Princeton University Press, Published in 1950, 207 pages
38. Projective Geometry
    Nigel Hitchin | , Published in 2003, 74 pages
39. SPSS: Stats Practically Short and Simple
    Sidney Tyrrell | BookBoon, Published in 2009, 83 pages
40. Group Theory
    Ferdi Aryasetiawan | University of Lund, Published in 1997, 140 pages
41. Bayesian Field Theory
    J. C. Lemm | arXiv.org, Published in 2000, 200 pages
42. Combinatorial Optimization: Exact and Approximate Algorithms
    Luca Trevisan | Stanford University, Published in 2011, 139 pages
43. A Concise Geometry
    Clement V. Durell | G. Bell And Sons Limited., Published in 1921, 333 pages
44. Practical Mathematics for Home Study
    Claude Irwin Palmer | McGraw-Hill, Published in 1919, 528 pages
45. A Problem-Solving Approach to College Algebra
    Marcel B. Finan | Arkansas Tech University, Published in 2002, 92 pages
46. Integrate Your Brain: How To Do Calculus In Your Head
    Aaron Maxwell | Lulu.com, Published in 2006, 51 pages
47. Theory of Functions of a Complex Variable
    Heinrich Burkhardt | D. C. Heath, Published in 1913, 456 pages
48. Principles of Uncertainty
    Joseph B. Kadane | Chapman and Hall/CRC, Published in 2011, 499 pages
49. Lectures on Birational Geometry
    Caucher Birkar | arXiv, Published in 2012, 85 pages
50. Geometry with an Introduction to Cosmic Topology
    Mike Hitchman | , Published in 2017, 177 pages
51. Topics in dynamics I: Flows
    Edward Nelson | Princeton University Press, Published in 1969, 122 pages
52. Linear Algebra: An Introduction to Mathematical Discourse
    | Wikibooks, Published in 2011
53. Explaining Logarithms
    Dan Umbarger | Brown Books Publishing Group, Published in 2006, 112 pages
54. An Introduction to Algebraic Surgery
    Andrew Ranicki | arXiv, Published in 2000, 82 pages
55. Symbolic Logic
    Lewis Carroll | Macmillan and co, Published in 1897
56. The Algebra of Invariants
    J.H. Grace, A. Young | Cambridge, University Press, Published in 1903, 404 pages
57. Lectures on Stochastic Processes
    K. Ito | Tata Institute of Fundamental Research, Published in 1960, 207 pages
58. Quasi-Projective Moduli for Polarized Manifolds
    Eckart Viehweg | Springer, Published in 1995, 326 pages
59. Introduction to the Numerical Integration of PDEs
    B. Piette | University of Durham, Published in 2004, 89 pages
60. Complex Analysis on Riemann Surfaces
    Curtis McMullen | Harvard University, Published in 2005, 89 pages
61. Algebraic Groups, Lie Groups, and their Arithmetic Subgroups
    J. S. Milne | , Published in 2010, 383 pages
62. Mathematical Foundations of Probability Theory
    Gane Samb Lo | arXiv.org, Published in 2018, 378 pages
63. Modern Algebraic Topology
    D. G. Bourgin | Macmillan, Published in 1963, 544 pages
64. A Course of Elementary Mathematics
    John Radford Young | Wm. H. Allen, Published in 1862, 658 pages
65. Calculus Illustrated
    Peter Saveliev | , Published in 2020, 430 pages
66. Mathematical Methods
    Mihir Sen, Joseph M. Powers | University of Notre Dame, Published in 2010, 432 pages
67. Introduction to Differential Topology
    Uwe Kaiser | Boise State University, Published in 2006, 110 pages
68. Invitation to Dynamical Systems
    Edward R. Scheinerman | Prentice Hall College Div, Published in 2000, 384 pages
69. C*-algebraic Methods in Spectral Theory
    Serge Richard | Nagoya University, Published in 2014, 103 pages
70. Geometry and Group Theory
    Christopher Pope | Texas A&M University, Published in 2008, 181 pages
71. One Variable Advanced Calculus
    Kenneth Kuttler | Brigham Young University, Published in 2020, 394 pages
72. Euclid's Elements
    D.E.Joyce | , Published in 1998
73. Notes on the Atiyah-Singer Index Theorem
    Liviu I. Nicolaescu | University of Notre Dame, Published in 2005, 135 pages
74. Lectures on Cyclic Homology
    D. Husemoller | Tata Institute of Fundamental Research, Published in 1991, 114 pages
75. Yet Another Calculus Text
    Dan Sloughter | , Published in 2007, 147 pages
76. Everything Maths: Grade 10 Mathematics
    Neels van der Westhuizen, et al. | Siyavula, Published in 2012, 469 pages
77. Probability and Statistics Cookbook
    Matthias Vallentin | , Published in 2012, 31 pages
78. Intuitive Infinitesimal Calculus
    Viktor Blasjo | Intellectual Mathematics, Published in 2015, 98 pages
79. Nonlinear Parameter Estimation: An Integrated System in Basic
    John C. Nash | Marcel Dekker Inc, Published in 1995, 493 pages
80. Multivariable Calculus
    George Cain, James Herod | , Published in 1997
81. Geometric Complexity Theory: An Introduction for Geometers
    J.M. Landsberg | arXiv, Published in 2013, 38 pages
82. The Elements of Analytic Geometry
    Percey F. Smith, A. S. Gale | Ginn & company, Published in 1904, 450 pages
83. Euclid's Elements of Geometry
    J.L. Heiberg, R. Fitzpatrick | , Published in 2008, 545 pages
84. Complex and Adaptive Dynamical Systems: A Primer
    Claudius Gros | arXiv, Published in 2008, 276 pages
85. Scientific Computing
    Jeffrey R. Chasnov | Harvey Mudd College, Published in 2013, 152 pages
86. Notes on Introductory Point-Set Topology
    Allen Hatcher | Cornell University, Published in 2011, 53 pages
87. Introduction to Abstract Algebra
    D. S. Malik, John N. Mordeson, M.K. Sen | Creighton University, Published in 2007, 276 pages
88. Real Numbers and Fascinating Fractions
    N. M. Beskin | , Published in 1986
89. Complex Variables
    R. B. Ash, W. P. Novinger | , Published in 2004, 220 pages
90. An Introduction to Lie Group Integrators
    E. Celledoni, H. Marthinsen, B. Owren | arXiv, Published in 2012, 28 pages
91. Lectures on Expansion Techniques In Algebraic Geometry
    S.S. Abhyankar | Tata Institute Of Fundamental Research, Published in 1977, 169 pages
92. An Introduction to Determinants
    William Thomson | , Published in 1882, 122 pages
93. Topics in Geometry
    John O'Connor | University of St Andrews, Published in 2003
94. Lectures on Forms of Higher Degree
    J.I. Igusa | Tata Institute of Fundamental Research, Published in 1978, 169 pages
95. Discrete Optimization
    Guido Schaefer | Utrecht University, Published in 2012, 97 pages
96. Calculus of Residua: Complex Functions Theory a-2
    Leif Mejlbro | BookBoon, Published in 2010, 140 pages
97. Group theory for Maths, Physics and Chemistry
    Arjeh Cohen, Rosane Ushirobira, Jan Draisma | , Published in 2007, 93 pages
98. Design of Comparative Experiments
    R. A. Bailey | Cambridge University Press, Published in 2008, 348 pages
99. Lecture Notes in Lie Groups
    Vladimir G. Ivancevic, Tijana T. Ivancevic | arXiv, Published in 2011, 74 pages
100. Lectures on Exterior Differential Systems
     M. Kuranishi | Tata Institute of Fundamental Research, Published in 1962, 117 pages
101. Synchronization and Linearity: An Algebra for Discrete Event Systems
     F. Baccelli, G. Cohen, G. J. Olsder, J. Quadrat | John Wiley & Sons, Published in 1993, 501 pages
102. Topology Lecture Notes
     Thomas Ward | UEA, Published in 2001, 88 pages
103. Spectral Theory of Partial Differential Equations
     Richard S. Laugesen | arXiv, Published in 2012, 120 pages
104. Von Neumann Algebras
     Vaughan F. R. Jones | UC Berkeley Mathematics, Published in 2010, 159 pages
105. Linear Algebra
     David Cherney, Tom Denton, Andrew Waldron | UC Davis, Published in 2013, 410 pages
106. Symplectic, Poisson, and Noncommutative Geometry
     Tohru Eguchi, et al. | Cambridge University Press, Published in 2014, 290 pages
107. Elementary Algebra
     Denny Burzynski, Wade Ellis | College of Southern Nevada, Published in 2023, 1135 pages
108. Notes on Category Theory with examples from basic mathematics
     Paolo Perrone | arXiv, Published in 2021, 181 pages
109. Lectures on the Theory of Algebraic Functions of One Variable
     M. Deuring | Tata Institute of Fundamental Research, Published in 1959, 154 pages
110. Set Theory and Topology: An Introduction to the Foundations of Analysis
     Felix Nagel | arXiv, Published in 2013, 160 pages
111. Fredholm Operators and Spectral Flow
     Nils Waterstraat | arXiv, Published in 2016, 61 pages
112. The Haskell Road to Logic, Maths and Programming
     Kees Doets, Jan van Eijck | College Publications, Published in 2004, 449 pages
113. Chance and Luck
     Richard A. Proctor | Longmans, Green, and Co., Published in 1887, 164 pages
114. College Algebra
     Paul Dawkins | Lamar University, Published in 2011, 352 pages
115. A Philosophical Essay on Probabilities
     Pierre Simon Laplace | Chapman & Hall, Published in 1902, 234 pages
116. Lectures on Modular Functions of One Complex Variable
     H. Maass | Tata institute of Fundamental Research, Published in 1983, 242 pages
117. Lie groups and Lie algebras
     N. Reshetikhin, V. Serganova, R. Borcherds | UC Berkeley, Published in 2006, 179 pages
118. Abelian Categories: an Introduction to the Theory of Functors
     Peter Freyd | Harper and Row, Published in 1964, 192 pages
119. Introduction to Tensor Calculus
     Kees Dullemond, Kasper Peeters | University of Heidelberg, Published in 2010, 53 pages
120. Advanced Algebra
     John Redden | lardbucket.org, Published in 2014, 2094 pages
121. Basic Linear Algebra
     Andrew Baker | University of Glasgow, Published in 2008, 73 pages
122. How To Write Proofs
     Larry W. Cusick | California State University, Fresno, Published in 2009
123. A Treatise on the Theory of Invariants
     Oliver E. Glenn | Project Gutenberg, Published in 2006, 221 pages
124. Set Theory
     Gary Hardegree | UMass Amherst, Published in 2003
125. Residues and Duality
     Robin Hartshorne | Springer, Published in 1966, 434 pages
126. Logic for Computer Science
     Jean H. Gallier | Longman Higher Education, Published in 1986, 528 pages
127. Elliptic Functions
     Arthur Latham Baker | John Wiley & Sons, Published in 1890, 147 pages
128. Mathematical Biology
     Jeffrey R. Chasnov | The Hong Kong University of Science & Technology, Published in 2010, 115 pages
129. Calculus
     | Wikibooks, Published in 2011, 456 pages
130. A First Course on Time Series Analysis with SAS
     Michael Falk at al. | University of Wuerzburg, Published in 2011, 364 pages
131. Mathematics for Computer Science
     Eric Lehman, F Thomson Leighton, Albert R Meyer | MIT, Published in 2010, 557 pages
132. Calculus in Context
     James Callahan, et al. | Five Colleges, Inc., Published in 2008, 869 pages
133. Discrete Dynamical Systems
     Arild Wikan | Bookboon, Published in 2013, 254 pages
134. Elements of Plane Trigonometry
     Hugh Blackburn | Macmillan and co, Published in 1871, 143 pages
135. Examples of differential equations, with rules for their solution
     George A. Osborne | Boston, Ginn & Company, Published in 1899, 76 pages
136. Treatise on Differential Geometry and its role in Relativity Theory
     Subenoy Chakraborty | arXiv.org, Published in 2022, 259 pages
137. Lectures on Numerical Methods in Bifurcation Problems
     H.B. Keller | Tata Institute Of Fundamental Research, Published in 1986, 140 pages
138. Roots of a Compact Lie Group
     Kristopher Tapp | arXiv, Published in 2009, 39 pages
139. Second-order Ordinary Differential Equations
     R.S. Johnson | Bookboon, Published in 2012, 181 pages
140. Banach Modules and Functors on Categories of Banach Spaces
     J. Cigler, V. Losert, P.W. Michor | Marcel Dekker Inc, Published in 1979, 297 pages
141. Applied Discrete Structures
     Al Doerr, Ken Levasseur | Lulu.com, Published in 2013, 496 pages
142. Lectures on Discrete Subgroups of Lie Groups
     G.D. Mostow | Tata Institute of Fundamental Research, Published in 1969, 86 pages
143. Differential Equations with YouTube Examples
     Jeffrey R. Chasnov | BookBoon, Published in 2014, 57 pages
144. Higher Operads, Higher Categories
     Tom Leinster | arXiv, Published in 2003, 410 pages
145. Calculus: Early Transcendentals
     David Guichard | Lyryx, Published in 2016, 656 pages
146. Vedic Mathematics
     W. B. Kandasamy, F. Smarandache | Automaton, Published in 2006, 220 pages
147. Ordinary Differential Equations
     Dmitry Panchenko | University of Toronto, Published in 2018, 141 pages
148. Famous Problems of Elementary Geometry
     Felix Klein | Ginn and Co., Published in 1897, 108 pages
149. Shape Analysis, Lebesgue Integration and Absolute Continuity Connections
     Javier Bernal | arXiv.org, Published in 2019, 82 pages
150. Extracting Information from Random Data
     Pawel J. Szablowski | arXiv, Published in 2016, 167 pages
151. Intermediate Maths for Chemists
     J. E. Parker | Bookboon, Published in 2013, 106 pages
152. Differential Geometry: A First Course in Curves and Surfaces
     Theodore Shifrin | University of Georgia, Published in 2015, 127 pages
153. Stats without Tears
     Stan Brown | BrownMath.com, Published in 2016, 243 pages
154. Complex Manifolds
     Julius Ross | Stanford University, Published in 2014, 119 pages
155. Statistics, Probability, and Game Theory: papers in honor of David Blackwell
     David Blackwell, at al. | IMS, Published in 1996, 407 pages
156. The Air Force Brain Booster Book
     John C. Sparks | Air Force Publication, Published in 2006, 58 pages
157. Essentials of Trigonometry with Applications
     D.R. Curtiss, E.J. Moulton | D. C. Heath And Company, Published in 1942, 190 pages
158. Algorithms in Real Algebraic Geometry
     S. Basu, R. Pollack, M. Roy | Springer, Published in 2009, 672 pages
159. The Smarandache Function
     C. Dumitrescu, V. Seleacu | Erhus University Press, Published in 1996, 137 pages
160. Introductory Statistics: Concepts, Models, and Applications
     David W. Stockburger | Missouri State University, Published in 1996, 487 pages
161. Linear Algebra C-4: Quadratic equations in two or three variables
     Leif Mejlbro | BookBoon, Published in 2009, 74 pages
162. General Topology
     Jesper M. Moller | , Published in 2010, 75 pages
163. Knot Diagrammatics
     Louis H. Kauffman | arXiv, Published in 2004, 107 pages
164. Languages and Machines
     C. D. H. Cooper | Macquarie University, Published in 2008
165. Vector Math for 3D Computer Graphics
     Bradley Kjell | Central Connecticut State University, Published in 2003
166. The CRing Project: a collaborative open source textbook on commutative algebra
     Shishir Agrawal, et al. | CRing Project, Published in 2011, 493 pages
167. Discrete Distributions
     Leif Mejlbro | BookBoon, Published in 2009, 72 pages
168. Essentials of Statistics: Exercises
     David Brink | BookBoon, Published in 2008, 58 pages
169. Mathematical Exercises for Home Work
     A.T. Richardson | Macmillan and co., Published in 1892, 364 pages
170. Model Theory
     Stephen G. Simpson | The Pennsylvania State University, Published in 1998, 127 pages
171. Groupoids and Smarandache Groupoids
     W. B. Vasantha Kandasamy | American Research Press, Published in 2002, 115 pages
172. Differential Geometry in Physics
     Gabriel Lugo | University of North Carolina at Wilmington, Published in 2006, 61 pages
173. Contact Topology
     George Torres, Robert Gompf | University of Texas at Austin, Published in 2017, 51 pages
174. A Text-Book of Geometry
     G. A. Wentworth | Ginn & Company, Published in 1898, 264 pages
175. Category Theory in Context
     Emily Riehl | Dover Publications, Published in 2016, 258 pages
176. Essentials of Statistics
     David Brink | BookBoon, Published in 2008, 102 pages
177. Ample Subvarieties of Algebraic Varieties
     Robin Hartshorne | Springer, Published in 1970, 273 pages
178. Lectures on Statistics
     Robert B. Ash | University of Illinois, Published in 2007
179. Plane and Spherical Trigonometry in three parts
     Henry Bedingfield Goodwin | Longmans, Green, and Co., Published in 1907, 296 pages
180. Graph Theory: Advanced Algorithms and Applications
     Beril Sirmacek (ed.) | InTech, Published in 2018, 196 pages
181. generatingfunctionology
     Herbert S. Wilf | A K Peters, Ltd., Published in 2006, 245 pages
182. Elementary Calculus
     Frederick S Woods, Frederick H Bailey | Ginn and Company, Published in 1922, 323 pages
183. Design, Evaluation and Analysis of Combinatorial Optimization Heuristic Algorithms
     Daniel Karapetyan | arXiv, Published in 2012, 202 pages
184. Lectures notes on compact Riemann surfaces
     Bertrand Eynard | arXiv.org, Published in 2018, 119 pages
185. Congruence Lattices of Finite Algebras
     William DeMeo | arXiv, Published in 2012, 130 pages
186. Topics in the Theory of Quadratic Residues
     Steve Wright | arXiv, Published in 2014, 160 pages
187. Foundations of Infinitesimal Calculus
     H. Jerome Keisler | University of Wisconsin, Published in 2011, 213 pages
188. High-dimensional Knot Theory
     Andrew Ranicki | Springer, Published in 1998, 693 pages
189. Lie Algebras
     Shlomo Sternberg | , Published in 2004, 198 pages
190. Applied Statistics
     Mohammed A. Shayib | Bookboon, Published in 2013, 300 pages
191. Introduction to Mathematical Analysis
     B. Lafferriere, G. Lafferriere, N. Mau Nam | Portland State University Library, Published in 2015, 141 pages
192. Introduction to Linear Bialgebra
     W.B.V. Kandasamy, F. Smarandache, K. Ilanthenral | arXiv, Published in 2005, 238 pages
193. Notes on Automorphic Functions
     Anders Thorup | Kobenhavns Universitet, Published in 1995, 186 pages
194. An Introductory Course Of Mathematical Analysis
     Charles Walmsley | Cambridge University Press, Published in 1920, 268 pages
195. Homogeneous Spaces and Equivariant Embeddings
     Dmitri A. Timashev | arXiv, Published in 2006, 250 pages
196. Modern Geometry
     Robert Sharpley | University of South Carolina, Published in 2008, 230 pages
197. Introductory Treatise On Lie's Theory Of Finite Continuous Transformation Groups
     John Edward Campbell | Oxford Clarendon Press, Published in 1903, 460 pages
198. A Semester Course in Trigonometry
     Marcel B. Finan | Arkansas Tech University, Published in 2003, 264 pages
199. Encyclopedia of Dynamical Systems
     D. Anosov, at al. | Scholarpedia, Published in 2009
200. Advanced Geometry for High Schools: Synthetic and Analytical
     A.H. McDougall | Copp, Clark, Published in 1919, 236 pages
201. A Course in Universal Algebra
     S. Burris, H.P. Sankappanavar | Springer-Verlag, Published in 1982, 331 pages
202. Temporal Networks
     Petter Holme, Jari Saramäki | arXiv, Published in 2011, 25 pages
203. Category Theory
     | Wikibooks, Published in 2010
204. Chaos: Classical and Quantum
     Predrag Cvitanovic | ChaosBook.org, Published in 2008, 813 pages
205. Topics in Random Matrix Theory
     Terence Tao | , Published in 2011, 340 pages
206. An Introduction to Real Analysis
     John K. Hunter | University of California Davis, Published in 2014, 305 pages
207. Recent Progress on the Random Conductance Model
     Marek Biskup | arXiv, Published in 2012, 80 pages
208. Magic Squares and Cubes
     W. S. Andrews | Open Court Publishing Company, Published in 1917, 428 pages
209. Galois Theory: Lectures Delivered at the University of Notre Dame
     Emil Artin | University of Notre Dame, Published in 1971, 96 pages
210. Functional Analysis
     Gerald Teschl | University of Vienna, Published in 2009, 142 pages
211. Lectures on Fundamental Concepts of Algebra and Geometry
     John Wesley Young | Macmillan and co., Published in 1917, 264 pages
212. An Elementary Treatise on Conic Sections
     Charles Smith | The Macmillan Company, Published in 1905, 378 pages
213. Digraphs: Theory, Algorithms and Applications
     Jorgen Bang-Jensen, Gregory Gutin | Springer, Published in 2002, 772 pages
214. Men of Mathematics
     E.T. Bell | Archive.org, Published in 1937
215. A Course Of Differential Geometry
     John Edward Campbell | Clarendon Press, Published in 1926, 288 pages
216. The Calculus for Beginners
     John William Mercer | Cambridge University Press, Published in 1914, 470 pages
217. Iterative Methods in Combinatorial Optimization
     Lap Chi Lau, R. Ravi, M. Singh | Cambridge University Press, Published in 2011, 229 pages
218. The Hauptvermutung Book: A Collection of Papers on the Topology of Manifolds
     A.A. Ranicki, et al, | Springer, Published in 1996, 194 pages
219. Programming for Computations - Python
     Svein Linge, Hans Petter Langtangen | Springer, Published in 2016, 232 pages
220. Natural Topology
     Frank Waaldijk | arXiv, Published in 2012, 174 pages
221. New Perspectives in Algebraic Combinatorics
     Louis J. Billera, at al. | Cambridge University Press, Published in 1999, 345 pages
222. Brief Calculus
     Benjamin Crowell | , Published in 2015, 207 pages
223. The Modern Geometry of the Triangle
     William Gallatly | F. Hodgson, Published in 1914, 126 pages
224. Elements of the Differential and Integral Calculus
     William Anthony Granville | Ginn, Published in 1911, 493 pages
225. From D-modules to Deformation Quantization Modules
     Pierre Schapira | UPMC, Published in 2012, 89 pages
226. Mathematics for the Physical Sciences
     Leslie Copley | De Gruyter Open, Published in 2014, 446 pages
227. Theory of the Integral
     Stanislaw Saks | Polish Mathematical Society, Published in 1937, 347 pages
228. Topology and Physics: A Historical Essay
     C. Nash | arXiv, Published in 1997, 60 pages
229. Applied Combinatorics
     S. E. Payne | University of Colorado, Published in 2003, 216 pages
230. A Review of Algebra
     Romeyn Henry Rivenburg | American Book Company, Published in 1914, 80 pages
231. Generic Polynomials: Constructive Aspects of the Inverse Galois Problem
     C. U. Jensen, A. Ledet, N. Yui | Cambridge University Press, Published in 2002, 268 pages
232. An introduction to Noncommutative Projective Geometry
     D. Rogalski | arXiv, Published in 2014, 55 pages
233. Lectures on the Philosophy of Mathematics
     James Byrnie Shaw | Open Court Pub. Co, Published in 1918, 222 pages
234. Abstract Algebra Done Concretely
     Donu Arapura | Purdue University, Published in 2017, 77 pages
235. Combinatorial Geometry with Application to Field Theory
     Linfan Mao | InfoQuest, Published in 2009, 499 pages
236. Axiomatic Set Theory
     Michael Meyling | , Published in 2011, 36 pages
237. Non-Uniform Random Variate Generation
     Luc Devroye | Springer, Published in 1986, 843 pages
238. Linear Algebra for Informatics
     José Figueroa-O'Farrill | The University of Edinburgh, Published in 2005, 69 pages
239. Existence, multiplicity, perturbation, and concentration results for a class of quasi-linear elliptic problems
     Marco Squassina | Electronic Journal of Differential Equations, Published in 2006, 213 pages
240. An Elementary Introduction to Group Theory
     M. E. Charkani | AMS, Published in 2018, 47 pages
241. Model Theory
     C. Ward Henson | University of South Carolina, Published in 2010, 122 pages
242. Preparing for College Physics
     David Murdock | TTU, Published in 2002, 64 pages
243. Introduction to the Basics of Heegaard Floer Homology
     Bijan Sahamie | arXiv, Published in 2010, 71 pages
244. Algorithmic Number Theory
     J.P. Buhler, P. Stevenhagen | Cambridge University Press, Published in 2008, 662 pages
245. Operators on Hilbert Space
     John Erdos | King's College London, Published in 2004, 52 pages
246. Numerical Methods For Time Dependent Equations
     P. Lascaux | Tata Institute of Fundamental Research, Published in 1976, 162 pages
247. Lectures on Lie Groups and Representations of Locally Compact Groups
     F. Bruhat | Tata Institute of Fundamental Research, Published in 1958, 140 pages
248. Statistical Tools for Economists
     Daniel McFadden | University of California, Berkeley, Published in 2001
249. Geometry of Numbers with Applications to Number Theory
     Pete L. Clark | University of Georgia, Published in 2015, 159 pages
250. A Primer on Homotopy Colimits
     Daniel Dugger | University of Oregon, Published in 2008, 72 pages
251. Integration and Differential Equations
     R.S. Johnson | BookBoon, Published in 2012, 122 pages
252. E 'Infinite' Ring Spaces and E 'Infinite' Ring Spectra
     J. P. May | Springer, Published in 1977, 280 pages
253. Trigonometry
     Ted Sundstrom, Steven Schlicker | Grand Valley State University, Published in 2016, 442 pages
254. Global Analysis: Functional Analysis Examples
     Leif Mejlbro | BookBoon, Published in 2009, 78 pages
255. Mathematics in the Age of the Turing Machine
     Thomas Hales | arXiv, Published in 2013, 45 pages
256. Advances in Graph Algorithms
     Ton Kloks, Yue-Li Wang | viXra.org, Published in 2013, 178 pages
257. Higher Elementary Geometry
     Venugopal | , Published in 1958, 135 pages
258. Art Gallery Theorems and Algorithms
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475. Topics in Differential Geometry
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489. On 2D Inverse Problems
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