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. Differential Topology
   Bjorn Ian Dundas | Johns Hopkins University, Published in 2002, 183 pages
2. Calculus
   Gilbert Strang | Wellsley Cambridge Press, Published in 1991, 671 pages
3. The Matrix Cookbook
   Kaare Brandt Petersen, Michael Syskind Pedersen | , Published in 2008, 67 pages
4. Trigonometry for Beginners
   J. B. Lock | The MacMillan Company, Published in 1896, 236 pages
5. A Course In Commutative Algebra
   Robert B. Ash | University of Illinois, Published in 2006
6. Neutral and Non-Euclidean Geometries
   David C. Royster | UNC Charlotte, Published in 2000, 145 pages
7. A Brief Introduction to the Infinitesimal Calculus
   Irving Fisher | Macmillan, Published in 1921, 110 pages
8. Notes on Differential Geometry and Lie Groups
   Jean Gallier | University of Pennsylvania, Published in 2010
9. Category Theory Lecture Notes
   Michael Barr, Charles Wells | , Published in 1999, 133 pages
10. An Introduction to Complex Algebraic Geometry
    Chris Peters | Institut Fourier Grenoble, Published in 2004, 129 pages
11. History of Modern Mathematics
    David Eugene Smith | Columbia University, Published in 1906, 75 pages
12. Lectures on Curves on Rational and Unirational Surfaces
    Masayoshi Miyanishi | Tata Institute of Fundamental Research, Published in 1978, 267 pages
13. Introduction to Symplectic Field Theory
    Y. Eliashberg, A. Givental, H. Hofer | arXiv, Published in 2000, 102 pages
14. Vector Math for 3D Computer Graphics
    Bradley Kjell | Central Connecticut State University, Published in 2003
15. Statistical Theory
    Ryan Martin | University of Illinois at Chicago, Published in 2015, 117 pages
16. Strings and Geometry
    M. Douglas, J. Gauntlett, M. Gross | American Mathematical Society, Published in 2004, 384 pages
17. Notes on Discrete Mathematics
    Miguel A. Lerma | , Published in 2005, 154 pages
18. Archimedes
    Thomas Little Heath | , Published in 1920, 76 pages
19. An Introduction to Algebraic Number Theory
    F. Oggier | Nanyang Technological University, Published in 2010, 95 pages
20. Lectures on Differential Equations
    Craig A. Tracy | University of California, Published in 2011, 131 pages
21. n-Linear Algebra of Type II
    W. B. V. Kandasamy, F. Smarandache | InfoLearnQuest, Published in 2008, 231 pages
22. Convex Optimization
    Stephen Boyd, Lieven Vandenberghe | Cambridge University Press, Published in 2004, 730 pages
23. Euclid's Elements
    D.E.Joyce | , Published in 1998
24. Opera Magistris
    Vincent Isoz | Sciences.ch, Published in 2016, 5273 pages
25. First Steps in Numerical Analysis
    R. Hosking, S. Joe, D. Joyce, and J. Turner | , Published in 1998, 338 pages
26. An Introduction to Probability and Random Processes
    Gian-Carlo Rota, Kenneth Baclawski | , Published in 1979, 467 pages
27. Statistics Done Wrong
    Alex Reinhart | refsmmat.com, Published in 2013, 437 pages
28. Quantitative Analysis: Algebra with a Business Perspective
    Donna M. Wacha | Bookboon, Published in 2013, 303 pages
29. Algebra: Abstract and Concrete
    Frederick M. Goodman | Semisimple Press, Published in 2015, 587 pages
30. The Canterbury Puzzles and Other Curious Problems
    Henry Ernest Dudeney | Nelson, Published in 1919, 257 pages
31. Digraphs: Theory, Algorithms and Applications
    Jorgen Bang-Jensen, Gregory Gutin | Springer, Published in 2002, 772 pages
32. Mathematical Principals of Dynamic Systems and the Foundations of Quantum Physics
    Eric Tesse | arXiv, Published in 2011, 87 pages
33. Numerical Algorithms: Methods for Computer Vision, Machine Learning, and Graphics
    Justin Solomon | CRC Press, Published in 2015, 397 pages
34. Differential Topology of Fiber Bundles
    Karl-Hermann Neeb | FAU Erlangen-Nuernberg, Published in 2010, 146 pages
35. Elementary Abstract Algebra: Examples and Applications
    Justin Hill, Chris Thron | Texas A&M University, Published in 2017, 785 pages
36. Commutative Algebra
    Jacob Lurie, Akhil Mathew | Harvard University, Published in 2010, 172 pages
37. An Introduction to Mathematics
    A. N. Whitehead | Williams & Northgate, Published in 1911, 274 pages
38. Principles of Data Analysis
    Cappella Archive | Prasenjit Saha, Published in 2003, 113 pages
39. Set Theoretic Real Analysis
    Krzysztof Ciesielski | Heldermann Verlag, Published in 1997, 48 pages
40. Tilings and Patterns
    E O Harriss | Mathematicians.org.uk, Published in 2008, 43 pages
41. Basic Calculus Refresher
    Ismor Fischer | University of Wisconsin, Published in 2008, 21 pages
42. A Short Account of the History of Mathematics
    W. W. Rouse Ball | Dover Publications, Published in 1960, 466 pages
43. Applied and Computational Linear Algebra: A First Course
    Charles L. Byrne | University of Massachusetts Lowell, Published in 2013, 504 pages
44. Chaos Theory
    Kais A. Mohamedamen Al Naimee (ed.) | InTech, Published in 2018, 260 pages
45. Fundamentals of Practical Mathematics
    George Wentworth | Ginn and Co., Published in 1922, 220 pages
46. The Geometry and Topology of Three-Manifolds
    William P Thurston | Mathematical Sciences Research Institute, Published in 2002, 502 pages
47. Foundations of Combinatorics with Applications
    Edward A. Bender, S. Gill Williamson | Dover Publications, Published in 2006, 480 pages
48. Complex Analytic and Differential Geometry
    Jean-Pierre Demailly | Universite de Grenoble, Published in 2007, 571 pages
49. Multivariable Calculus
    Wong Yan Loi | National University of Singapore, Published in 2013, 105 pages
50. Elementary Analytic Functions: Complex Functions Theory a-1
    Leif Mejlbro | BookBoon, Published in 2010, 145 pages
51. First Book in Arithmetic
    | W.W. Shannon, Published in 1905, 268 pages
52. Lectures on Representation Theory and Invariant Theory
    William Crawley-Boevey | University of Leeds, Published in 1990, 77 pages
53. Categories and Homological Algebra
    Pierre Schapira | UPMC, Published in 2011, 125 pages
54. Seven Sketches in Compositionality: An Invitation to Applied Category Theory
    Brendan Fong, David I Spivak | arXiv.org, Published in 2018, 243 pages
55. Topics in Algebraic Combinatorics
    Richard P. Stanley | MIT, Published in 2013, 127 pages
56. Advanced Algebra
    John Redden | lardbucket.org, Published in 2014, 2094 pages
57. Lectures on Forms of Higher Degree
    J.I. Igusa | Tata Institute of Fundamental Research, Published in 1978, 169 pages
58. Smarandache Semirings, Semifields and Semivector Spaces
    W. B. Vasantha Kandasamy | American Research Press, Published in 2002, 122 pages
59. Combinatory Analysis
    Percy A. MacMahon | Cambridge University Press, Published in 1915, 612 pages
60. n-Linear Algebra of Type I and Its Applications
    W. B. V. Kandasamy, F. Smarandache | InfoLearnQuest, Published in 2008, 120 pages
61. Mathematical Recreations and Essays
    W. W. Rouse Ball | Macmillan, Published in 1914, 506 pages
62. Ample Subvarieties of Algebraic Varieties
    Robin Hartshorne | Springer, Published in 1970, 273 pages
63. A History Of The Mathematical Theory Of Probability
    I. Todhunter | Kessinger Publishing, LLC, Published in 2007, 640 pages
64. Lectures on Linear Logic
    A. S. Troelstra | CSLI, Published in 1992, 215 pages
65. Conic Sections Treated Geometrically
    W. H. Besant | George Bell and Sons, Published in 1895, 367 pages
66. Linear Algebra: An Introduction to Mathematical Discourse
    | Wikibooks, Published in 2011
67. Isometrica: A Geometrical Introduction to Planar Crystallographic Groups
    George Baloglou | , Published in 2007, 473 pages
68. Differential Calculus
    Pierre Schapira | Université Paris VI, Published in 2011, 60 pages
69. Lectures On Old And New Results On Algebraic Curves
    P. Samuel | Tata Institute Of Fundamental Research, Published in 1966, 99 pages
70. Practical Mathematics for Home Study
    Claude Irwin Palmer | McGraw-Hill, Published in 1919, 528 pages
71. Complex Manifolds
    Julius Ross | Stanford University, Published in 2014, 119 pages
72. The Elements of Non-Euclidean Geometry
    D.M.Y. Sommerville | G.Bell & Sons Ltd., Published in 1914, 158 pages
73. The CRing Project: a collaborative open source textbook on commutative algebra
    Shishir Agrawal, et al. | CRing Project, Published in 2011, 493 pages
74. Introduction to Shimura Varieties
    J.S. Milne | , Published in 2004, 149 pages
75. H Ring Spectra and Their Applications
    R. R. Bruner, J. P. May, J. E. McClure, M. Steinberger | Springer, Published in 1986, 400 pages
76. A History of Mathematics
    Florian Cajori | The MacMillan Company, Published in 1909, 556 pages
77. Finite Group Schemes
    Richard Pink | ETH Zurich, Published in 2005, 78 pages
78. Probability and Statistics for Geophysical Processes
    D. Koutsoyiannis | National Technical University of Athens, Published in 2008, 161 pages
79. Algorithmic Mathematics
    Leonard Soicher, Franco Vivaldi | Queen Mary University of London, Published in 2004, 94 pages
80. Analytic geometry for colleges, universities, and technical schools
    E.W. Nichols | Leach, Shewell & Sanborn, Published in 1892, 304 pages
81. Quantum Physics, Relativity, and Complex Spacetime
    Gerald Kaiser | University of Massachusetts at Lowell, Published in 2003, 252 pages
82. Why are Braids Orderable?
    Patrick Dehornoy, at al. | , Published in 2010, 206 pages
83. Encyclopaedia of Mathematics
    Michiel Hazewinkel | Springer, Published in 2011
84. Analytic Geometry and Calculus
    F.S. Woods, F.H. Bailey | Ginn and Company, Published in 1917, 542 pages
85. The Algebra of Logic
    Louis Couturat | Project Gutenberg, Published in 2004, 102 pages
86. Essentials of Statistics: Exercises
    David Brink | BookBoon, Published in 2008, 58 pages
87. Lectures on Topics in Stochastic Differential Equations
    Daniel W. Stroock | Tata Institute of Fundamental Research, Published in 1982, 93 pages
88. Bayesian Field Theory
    J. C. Lemm | arXiv.org, Published in 2000, 200 pages
89. Statistical Treatment of Experimental Data
    Hugh D. Young | McGraw Hill, Published in 1962
90. Linear Methods of Applied Mathematics
    Evans M. Harrell II, James V. Herod | , Published in 2000
91. Easy Mathematics: Arithmetic and Algebra for General Readers
    Oliver Lodge | The Macmillan Company, Published in 1910, 466 pages
92. Symbolic Logic: A First Course
    Gary Hardegree | Mcgraw-Hill College, Published in 1999, 468 pages
93. Smooth Numbers: Computational Number Theory and Beyond
    Andrew Granville | Universite de Montreal, Published in 2008, 58 pages
94. Algebraic Tools for Modal Logic
    Mai Gehrke, Yde Venema | ESSLLI, Published in 2001, 109 pages
95. Mathematics for the Physical Sciences
    Herbert S Wilf | Dover Publications, Published in 1962, 298 pages
96. Lectures on a Method in the Theory of Exponential Sums
    M. Jutila | Tata Institute of Fundamental Research, Published in 1987, 134 pages
97. Symplectic Reflection Algebras
    Gwyn Bellamy | arXiv, Published in 2012, 64 pages
98. An Introduction to Riemannian Geometry with Applications to Mechanics and Relativity
    Leonor Godinho, Jose Natario | , Published in 2004, 272 pages
99. Lectures on Siegel Modular Forms and Representation by Quadratic Forms
    Y. Kitaoka | Tata Institute of Fundamental Research, Published in 1986, 197 pages
100. Combinatorial Optimization: Exact and Approximate Algorithms
     Luca Trevisan | Stanford University, Published in 2011, 139 pages
101. Symplectic Geometry
     Ana Cannas da Silva | Princeton University, Published in 2004, 109 pages
102. Smarandache Near-rings
     W. B. Vasantha Kandasamy | American Research Press, Published in 2002, 201 pages
103. Algebraic Topology
     Allen Hatcher | Cambridge University Press, Published in 2001, 559 pages
104. The Classification Theorem for Compact Surfaces
     Jean Gallier, Dianna Xu | , Published in 2009, 134 pages
105. A Course in Universal Algebra
     S. Burris, H.P. Sankappanavar | Springer-Verlag, Published in 1982, 331 pages
106. Geometric Theorems and Arithmetic Functions
     Jozsef Sandor | American Research Press, Published in 2002, 55 pages
107. Statistics
     Philip B. Stark | University of California, Berkeley, Published in 2011
108. Linearization via the Lie Derivative
     Carmen Chicone, Richard Swanson | American Mathematical Society, Published in 2000, 64 pages
109. Geometric Wave Equations
     Stefan Waldmann | arXiv, Published in 2012, 279 pages
110. Axiom: The Scientific Computation System
     Richard D. Jenks, Robert S. Sutor | axiom-developer.org, Published in 2003, 1200 pages
111. The World of Mathematics
     Philipp Legner | Mathigon, Published in 2012
112. Lectures on Minimal Surface Theory
     Brian White | arXiv, Published in 2013, 46 pages
113. Linear Partial Differential Equations and Fourier Theory
     Marcus Pivato | Cambridge University Press, Published in 2005, 619 pages
114. Algebra I
     | CK-12 Foundation, Published in 2009, 992 pages
115. The Algebraic Theory of Modular Systems
     Francis Sowerby Macaulay | Cambridge University Press, Published in 1916, 140 pages
116. A First Course in Topology: Continuity and Dimension
     John McCleary | American Mathematical Society, Published in 2006, 210 pages
117. Notes on Differential Equations
     Bob Terrell | , Published in 2005, 99 pages
118. Discrete Optimization
     Guido Schaefer | Utrecht University, Published in 2012, 97 pages
119. The Story of Euclid
     W. B. Frankland | George Newnes, Published in 1902, 183 pages
120. Think Stats: Probability and Statistics for Programmers
     Allen B. Downey | Green Tea Press, Published in 2011, 122 pages
121. Lectures on Potential Theory
     M. Brelot | Tata Institute of Fundamental Research, Published in 1967, 158 pages
122. Uncertainty Theory
     Baoding Liu | Tsinghua University, Published in 2018, 501 pages
123. Toeplitz and Circulant Matrices: A review
     Robert M. Gray | Now Publishers Inc, Published in 2006, 104 pages
124. Basic Real Analysis
     Anthony W. Knapp | Birkhäuser, Published in 2016, 840 pages
125. Fractal Geometry
     Michael Frame, Benoit Mandelbrot, Nial Neger | Yale University, Published in 2009, 323 pages
126. Introductory Finite Difference Methods for PDEs
     D. M. Causon, C. G. Mingham | BookBoon, Published in 2010, 144 pages
127. Markov Chains and Stochastic Stability
     S.P. Meyn, R.L. Tweedie | Springer, Published in 2005, 567 pages
128. Algebraic Logic
     H. Andreka, I. Nemeti, I. Sain | , Published in 2003, 129 pages
129. Topics in Real and Functional Analysis
     Gerald Teschl | Universitaet Wien, Published in 2016, 486 pages
130. Super Special Codes using Super Matrices
     W.B.V. Kandasamy, F. Smarandache, K.Ilanthenral | arXiv, Published in 2010, 161 pages
131. Linear Algebra
     Paul Dawkins | Lamar University, Published in 2011, 331 pages
132. Lectures on Topics In The Theory of Infinite Groups
     B.H. Neumann | Tata Institute of Fundamental Research, Published in 1960, 200 pages
133. Introduction to the Theory of Infinite-Dimensional Dissipative Systems
     Constantin I. Chueshov | ACTA, Published in 2002, 419 pages
134. Lectures on Stochastic Flows and Applications
     H. Kunita | Tata Institute Of Fundamental Research, Published in 1986, 130 pages
135. Numerical Methods for Large Eigenvalue Problems
     Yousef Saad | SIAM, Published in 2011, 285 pages
136. A Second Course in Elementary Ordinary Differential Equations
     Marcel B. Finan | Arkansas Tech University, Published in 2006, 201 pages
137. Iterative Methods in Combinatorial Optimization
     Lap Chi Lau, R. Ravi, M. Singh | Cambridge University Press, Published in 2011, 229 pages
138. Geometry and the Imagination
     Conway, Doyle, Thurston | Rutgers University, Newark, Published in 2018, 116 pages
139. Theory of Symmetry and Ornament
     Slavik V. Jablan | Matematicki Institut, Published in 1995, 331 pages
140. Lecture notes on C*-algebras, Hilbert C*-modules, and quantum mechanics
     N.P. Landsman | arXiv, Published in 1998, 90 pages
141. Tensor Calculus
     Taha Sochi | viXra, Published in 2016, 91 pages
142. Difference Equations to Differential Equations - An introduction to calculus
     Dan Sloughter | , Published in 2000, 599 pages
143. Interactive Real Analysis
     Bert G. Wachsmuth | Seton Hall University, Published in 2007
144. Linear Algebra C-4: Quadratic equations in two or three variables
     Leif Mejlbro | BookBoon, Published in 2009, 74 pages
145. Elementary Linear Algebra
     Kenneth Kuttler | The Saylor Foundation, Published in 2012, 433 pages
146. A Sampler of Riemann-Finsler Geometry
     D. Bao, R. Bryant, S. Chern, Z. Shen | Cambridge University Press, Published in 2004, 376 pages
147. Statistics, Probability, and Game Theory: papers in honor of David Blackwell
     David Blackwell, at al. | IMS, Published in 1996, 407 pages
148. Integral Operators
     Leif Mejlbro | BookBoon, Published in 2009, 66 pages
149. Lectures on Entire Functions
     B. Ya. Levin | American Mathematical Society, Published in 1996, 265 pages
150. Lectures on Stochastic Differential Equations and Malliavin Calculus
     S. Watanabe | Tata Institute of Fundamental Research, Published in 1984, 113 pages
151. Plane and Solid Analytic Geometry
     W. F. Osgood, W. C. Graustein | Macmillan and co., Published in 1921, 651 pages
152. Convex Bodies and Algebraic Geometry
     Tadao Oda | Springer, Published in 1988, 219 pages
153. Vector Calculus
     Michael Corral | Schoolcraft College, Published in 2008, 222 pages
154. Multivariable Advanced Calculus
     Kenneth Kuttler | , Published in 2016, 450 pages
155. Introduction to Differential Geometry and General Relativity
     Stefan Waner | , Published in 2005, 138 pages
156. Differential Geometry: Lecture Notes
     Dmitri Zaitsev | Trinity College Dublin, Published in 2004, 49 pages
157. An Introductory Course Of Mathematical Analysis
     Charles Walmsley | Cambridge University Press, Published in 1920, 268 pages
158. Lectures on Mean Periodic Functions
     J.P. Kahane | Tata Institute of Fundamental Research, Published in 1959, 165 pages
159. Projective Geometry
     Nigel Hitchin | , Published in 2003, 74 pages
160. Applied Combinatorics
     Mitchel T. Keller, William T. Trotter | Georgia Institute of Technology, Published in 2013, 345 pages
161. Lectures On Approximation By Polynomials
     J.G. Burkill | Tata Institute of Fundamental Research, Published in 1959, 75 pages
162. forall x: An Introduction to Formal Logic
     P.D. Magnus | , Published in 2008, 160 pages
163. The Convenient Setting of Global Analysis
     Andreas Kriegl, Peter W. Michor | American Mathematical Society, Published in 1997, 624 pages
164. Lie Groups in Physics
     G. 't Hooft, M. J. G. Veltman | Utrecht University, Published in 2007, 75 pages
165. Differential Geometrical Theory of Statistics
     Frederic Barbaresco, Frank Nielsen (eds) | MDPI AG, Published in 2017, 474 pages
166. Euclid's 'Elements' Redux
     Daniel Callahan | starrhorse.com, Published in 2014, 359 pages
167. Lectures on Stochastic Analysis
     Thomas G. Kurtz | University of Wisconsin, Published in 2007, 119 pages
168. Functions Modeling Change: A Precalculus Course
     Marcel B. Finan | Arkansas Tech University, Published in 2003, 239 pages
169. Geometry with an Introduction to Cosmic Topology
     Mike Hitchman | , Published in 2017, 177 pages
170. Advanced Topics in Probability
     S.R.S. Varadhan | New York University, Published in 2011, 203 pages
171. Mathematics of Modality
     Robert Goldblatt | CSLI Publications, Published in 1993, 288 pages
172. Relationships, Change and Mathematical Analysis
     Roy McWeeny | Learning Development Institute, Published in 2011, 94 pages
173. Algebra for Beginners
     James Loudon | Copp, Clark & Co, Published in 1876, 172 pages
174. Linear Programming
     Jim Burke | University of Washington, Published in 2012
175. Calculus, Applications and Theory
     Kenneth Kuttler | , Published in 2008, 912 pages
176. Multiplication of Vectors and Structure of 3D Euclidean Space
     Miroslav Josipovic | viXra, Published in 2016, 70 pages
177. Spectral Theory
     Leif Mejlbro | BookBoon, Published in 2009, 80 pages
178. Commutative Algebra and Noncommutative Algebraic Geometry
     David Eisenbud, et al. | Cambridge University Press, Published in 2015, 775 pages
179. Euclidean Plane and Its Relatives
     Anton Petrunin | , Published in 2017, 201 pages
180. Residuals and Influence in Regression
     R. Dennis Cook, Sanford Weisberg | Chapman & Hall, Published in 1982, 240 pages
181. A Modern Course on Curves and Surfaces
     Richard S. Palais | virtualmathmuseum.org, Published in 2003, 163 pages
182. On Riemann's Theory of Algebraic Functions and their Integrals
     Felix Klein | Macmillan and Bowes, Published in 1893, 128 pages
183. Cusps of Gauss Mappings
     Thomas Banchoff, Terence Gaffney, Clint McCrory | Pitman Advanced Pub. Program, Published in 1982, 88 pages
184. A Mathematicians Miscellany
     J. E. Littlewood | Methuen And Company Limited, Published in 1953, 152 pages
185. Almost None of the Theory of Stochastic Processes
     Cosma Rohilla Shalizi | Carnegie Mellon University, Published in 2010, 347 pages
186. Endless Amusement
     | Lea and Blanchard, Published in 1847, 217 pages
187. Introduction to Lebesgue Integration
     W W L Chen | Macquarie University, Published in 1996, 75 pages
188. Algorithmic Number Theory
     J.P. Buhler, P. Stevenhagen | Cambridge University Press, Published in 2008, 662 pages
189. Rotations of Vectors Via Geometric Algebra
     James A. Smith | viXra, Published in 2016, 76 pages
190. Lectures on Integrable Probability
     Alexei Borodin, Vadim Gorin | arXiv, Published in 2012, 63 pages
191. A Philosophical Essay on Probabilities
     Pierre Simon Laplace | Chapman & Hall, Published in 1902, 234 pages
192. Nonlinear Parameter Estimation: An Integrated System in Basic
     John C. Nash | Marcel Dekker Inc, Published in 1995, 493 pages
193. Logic for Computer Science
     Jean H. Gallier | Longman Higher Education, Published in 1986, 528 pages
194. Dave's Short Course in Trigonometry
     David E. Joyce | Clark University, Published in 2002
195. Shadows of the Truth: Metamathematics of Elementary Mathematics
     Alexandre Borovik | American Mathematical Society, Published in 2010, 293 pages
196. Mathematics and Physical Science in Classical Antiquity
     J. L. Heiberg | Oxford University Press, Published in 1922, 115 pages
197. Linear Algebra C-2: Geometrical Vectors, Vector Spaces and Linear Maps
     Leif Mejlbro | BookBoon, Published in 2009, 126 pages
198. Applied Mathematical Programming Using Algebraic Systems
     Bruce A. McCarl, Thomas H. Spreen | Texas A&M University, Published in 2011, 567 pages
199. College Trigonometry
     Carl Stitz, Jeff Zeager | Stitz Zeager Open Source Mathematics, Published in 2013, 398 pages
200. Notes on Optimization
     Pravin Varaiya | Van Nostrand, Published in 1972, 140 pages
201. Differential and Integral Calculus
     C. E. Love, E. D. Rainville | The MacMillan Company, Published in 1916, 369 pages
202. Predicative Arithmetic
     Edward Nelson | Princeton Univ Pr, Published in 1987, 201 pages
203. Practical Foundations of Mathematics
     Paul Taylor | Cambridge University Press, Published in 1999, 588 pages
204. Beginning and Intermediate Algebra
     Tyler Wallace | Lulu.com, Published in 2010, 489 pages
205. Linear Algebra, Infinite Dimensions, and Maple
     James V. Herod | Georgia Tech, Published in 1997
206. Foundations in Statistical Reasoning
     Pete Kaslik | , Published in 2018, 310 pages
207. Holonomy Groups in Riemannian Geometry
     Andrew Clarke, Bianca Santoro | arXiv, Published in 2012, 124 pages
208. Mathematics for the Practical Man
     George Howe | Van Nostrand, Published in 1918, 221 pages
209. Differential Equations From The Algebraic Standpoint
     Joseph Fels Ritt | The American Mathematical Society, Published in 1932, 201 pages
210. Homeomorphisms in Analysis
     Casper Goffman, at al. | American Mathematical Society, Published in 1997, 216 pages
211. Basic Concepts of Enriched Category Theory
     Max Kelly | Cambridge University Press, Published in 2005, 143 pages
212. Integrate Your Brain: How To Do Calculus In Your Head
     Aaron Maxwell | Lulu.com, Published in 2006, 51 pages
213. OpenIntro Statistics
     D.M. Diez, C.D. Barr, M. Cetinkaya-Rundel | OpenIntro, Published in 2012, 426 pages
214. Inner Algebra
     Aaron Maxwell | Lulu.com, Published in 2005, 94 pages
215. Algorithms in Real Algebraic Geometry
     S. Basu, R. Pollack, M. Roy | Springer, Published in 2009, 672 pages
216. Geometry for Elementary School
     | Wikibooks, Published in 2007, 72 pages
217. Harmonic Analysis, the Trace Formula, and Shimura Varieties
     J. Arthur, D. Ellwood, R. Kottwitz | American Mathematical Society, Published in 2005, 706 pages
218. Hopf Algebras, Quantum Groups and Yang-Baxter Equations
     Florin Felix Nichita (ed.) | MDPI AG, Published in 2019, 240 pages
219. Logic and Proof
     Lawrence C Paulson | University of Cambridge, Published in 2002, 79 pages
220. Everything you wanted to know about Data Analysis and Fitting
     Peter Young | arXiv, Published in 2012, 55 pages
221. Notes on Linear Algebra
     Peter J. Cameron | Queen Mary, University of London, Published in 2008, 124 pages
222. Complex Multiplication
     J. S. Milne | , Published in 2006, 113 pages
223. Functions and Their Graphs
     J. Nicholas, J. Hunter, J. Hargreaves | University of Sydney, Published in 1997, 77 pages
224. Mathematical Analysis II
     Elias Zakon | The TrilliaGroup, Published in 2009, 436 pages
225. Chaos: Classical and Quantum
     Predrag Cvitanovic | ChaosBook.org, Published in 2008, 813 pages
226. Languages and Machines
     C. D. H. Cooper | Macquarie University, Published in 2008
227. Introductory Mathematical Analysis
     W.P. Webber, L.C. Plant | John Wiley & sons, Published in 1919, 332 pages
228. Applied Analysis
     J. Hunter, B. Nachtergaele | World Scientific Publishing Company, Published in 2005, 439 pages
229. Lectures in Basic Computational Numerical Analysis
     James M. McDonough | University of Kentucky, Published in 2001, 166 pages
230. Singularities of Transition Processes in Dynamical Systems
     Alexander N. Gorban | American Mathematical Society, Published in 2004, 55 pages
231. Hyperbolic Functions
     James McMahon | John Wiley & Sons, Published in 1906, 106 pages
232. Introduction to Representations of Real Semisimple Lie Groups
     Matvei Libine | arXiv, Published in 2012, 132 pages
233. Universal Optimization and Its Application
     Alexander Bolonkin | viXra.org, Published in 2017, 161 pages
234. Engineering Analysis
     | Wikibooks, Published in 2012, 193 pages
235. Techniques of Applied Mathematics
     Andrew Fowler | University of Oxford, Published in 2005, 141 pages
236. Category Theory for Scientists
     David I. Spivak | arXiv, Published in 2013, 261 pages
237. Topology Lecture Notes
     Thomas Ward | UEA, Published in 2001, 88 pages
238. Introduction to Differential Topology
     Uwe Kaiser | Boise State University, Published in 2006, 110 pages
239. Voting, Arbitration & Fair Division: Mathematics of Social Choice
     Marcus Pivato | Trent University, Published in 2007, 181 pages
240. A Brief History of Mathematics
     Karl Fink | Open Court Publishing Company, Published in 1900, 366 pages
241. Dynamics in One Complex Variable
     John Milnor | Princeton University Press, Published in 1991, 146 pages
242. 18 Lectures on K-Theory
     Ioannis P. Zois | arXiv, Published in 2010, 137 pages
243. Elliptic Curves over Function Fields
     Douglas Ulmer | arXiv, Published in 2011, 72 pages
244. Categorical Homotopy Theory
     Emily Riehl | Cambridge University Press, Published in 2014, 292 pages
245. Numbers and Symbols: From Counting to Abstract Algebras
     Roy McWeeny | Learning Development Institute, Published in 2007, 53 pages
246. Introduction to Differential Equations
     Jeffrey R. Chasnov | The Hong Kong University of Science &Technology, Published in 2010, 126 pages
247. Proofs and Types
     J. Girard, Y. Lafont, P. Taylor | Cambridge University Press, Published in 1989, 183 pages
248. The Algebra of Invariants
     J.H. Grace, A. Young | Cambridge, University Press, Published in 1903, 404 pages
249. Foundations of Infinitesimal Calculus
     K.D. Stroyan | Academic Press, Inc., Published in 1997, 182 pages
250. Symbolic Tensor Calculus on Manifolds: a SageMath Implementation
     Eric Gourgoulhon, Marco Mancini | arXiv.org, Published in 2018, 72 pages
251. Around the Boundary of Complex Dynamics
     Roland K. W. Roeder | arXiv, Published in 2015, 56 pages
252. A Course in Combinatorial Optimization
     Alexander Schrijver | University of Amsterdam, Published in 2012, 221 pages
253. Advances in Discrete Differential Geometry
     Alexander I. Bobenko (ed.) | Springer, Published in 2016, 439 pages
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447. Logic for Computer Science
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