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. Lectures on Stratification of Complex Analytic Sets
   M.-H. Schwartz | Tata Institute of Fundamental Research, Published in 1966, 67 pages
2. Analytic Geometry
   L. P. Siceloff, G. Wentworth, D. E. Smith | Ginn and Company, Published in 1922, 296 pages
3. Proof, Sets, and Logic
   M. Randall Holmes | Boise State University, Published in 2009, 207 pages
4. Euclid's Elements
   D.E.Joyce | , Published in 1998
5. Plane and Spherical Trigonometry
   Elmer A. Lyman, Edwin C. Goddard | Allyn and Bacon, Published in 1900, 157 pages
6. An elementary treatise on Fourier's series and spherical, cylindrical, and ellipsoidal harmonics
   William Elwood Byerly | Ginn and company, Published in 1893, 309 pages
7. Spherical Trigonometry
   I. Todhunter | Macmillan and co, Published in 1886, 189 pages
8. Mathematics and Biology: The Interface, Challenges, and Opportunities
   Simon A. Levin | , Published in 2008
9. Mathematical Formula Handbook
   Wu-ting Tsai | National Taiwan University, Published in 2012, 28 pages
10. Algebraic Geometry
    J.S. Milne | , Published in 2008, 241 pages
11. Linear Elliptic Equations of Second Order
    Erich Miersemann | Leipzig University, Published in 2012, 87 pages
12. 18 Lectures on K-Theory
    Ioannis P. Zois | arXiv, Published in 2010, 137 pages
13. Mathematics and Group Theory in Music
    Athanase Papadopoulos | arXiv, Published in 2014, 33 pages
14. Geometric Topology: Localization, Periodicity and Galois Symmetry
    Dennis Sullivan | Springer, Published in 2005, 296 pages
15. Introduction to Representation Theory
    Fiona Murnaghan | University of Toronto, Published in 2010, 73 pages
16. Geometry: From Ancient to Modern
    Wong Yan Loi | National University of Singapore, Published in 1999, 52 pages
17. Fundamental Numerical Methods and Data Analysis
    George W. Collins, II | NASA ADS, Published in 2003, 254 pages
18. Modular Forms, Hecke Operators, and Modular Abelian Varieties
    Kenneth A. Ribet, William A. Stein | University of Washington, Published in 2003, 154 pages
19. Statistics
    | Wikibooks, Published in 2013, 236 pages
20. Elementary Calculus: An Approach Using Infinitesimals
    H. Jerome Keisler | Bodgen & Quigley, Published in 2012, 992 pages
21. Linear Algebra: Foundations to Frontiers
    M.E. Myers, P.M. van de Geijn, R.A. van de Geijn | ulaff.net, Published in 2014, 905 pages
22. Fundamental Concepts of Mathematics
    Farshid Hajir | University of Massachusetts, Published in 2005, 69 pages
23. Category Theory for the Sciences
    David I. Spivak | The MIT Press, Published in 2014, 496 pages
24. Practical Mathematics
    Cargill Gilston Knott | Chambers, Published in 1914, 652 pages
25. Synthetic Differential Geometry
    Anders Kock | Cambridge University Press, Published in 2006, 241 pages
26. Dynamics in One Complex Variable
    John Milnor | Princeton University Press, Published in 1991, 146 pages
27. Logic for Computer Science
    Jean H. Gallier | Longman Higher Education, Published in 1986, 528 pages
28. An Introduction to Mathematical Logic
    Wolfram Pohlers, Thomas Glass | , Published in 1992, 229 pages
29. Lectures on Topics in Mean Periodic Functions and the Two-Radius Theorem
    J. Delsarte | Tata Institute of Fundamental Research, Published in 1961, 151 pages
30. Algebraic Tools for Modal Logic
    Mai Gehrke, Yde Venema | ESSLLI, Published in 2001, 109 pages
31. Geometric Wave Equations
    Stefan Waldmann | arXiv, Published in 2012, 279 pages
32. Lectures on Deformations of Singularities
    Michael Artin | Tata Institute of Fundamental Research, Published in 1976, 110 pages
33. Calculus of Residua: Complex Functions Theory a-2
    Leif Mejlbro | BookBoon, Published in 2010, 140 pages
34. Stability Analysis via Matrix Functions Method
    A. A. Martynyuk | Bookboon, Published in 2013, 257 pages
35. Optimization Models For Decision Making
    Katta G. Murty | Springer, Published in 2010, 482 pages
36. Differentiable Manifolds
    Nigel Hitchin | , Published in 2003
37. Inverse Problem Theory and Methods for Model Parameter Estimation
    Albert Tarantola | SIAM, Published in 2004, 358 pages
38. Introductory Map Theory
    Yanpei Liu | Kapa & Omega, Published in 2010, 503 pages
39. A Mathematics Primer for Physics Graduate Students
    Andrew E. Blechman | , Published in 2007, 78 pages
40. A First Course in Linear Algebra
    Ken Kuttler | Lyryx, Published in 2014, 424 pages
41. Cribbage: A Strategy Guide for Beginners
    Jake Magnum | Smashwords, Published in 2016, 122 pages
42. Continuous Groups Of Transformations
    Luther Pfahler Eisenhart | Princeton University Press, Published in 1933, 319 pages
43. A Gentle Introduction to Tensors
    Boaz Porat | Technion, Published in 2010, 87 pages
44. Lectures on Etale Cohomology
    J. S. Milne | , Published in 2008, 196 pages
45. Tilings and Patterns
    E O Harriss | Mathematicians.org.uk, Published in 2008, 43 pages
46. Calculus for Beginners and Artists
    Daniel Kleitman | MIT, Published in 2009
47. Comments and topics on Smarandache notions and problems
    Kenichiro Kashihara | Erhus University Press, Published in 1996, 50 pages
48. Beginning and Intermediate Algebra
    Tyler Wallace | Lulu.com, Published in 2010, 489 pages
49. Abstract Algebra
    John A. Beachy, William D. Blair | Waveland, Published in 2006, 484 pages
50. An Introduction to Lie Group Integrators
    E. Celledoni, H. Marthinsen, B. Owren | arXiv, Published in 2012, 28 pages
51. Proofs in Mathematics
    Alexander Bogomolny | Interactive Mathematics Miscellany and Puzzles, Published in 2013, 272 pages
52. Convex Geometric Analysis
    Keith Ball, Vitali Milman | Cambridge University Press, Published in 1998, 236 pages
53. Nonstandard Analysis in Topology
    Sergio Salbany, Todor Todorov | arXiv, Published in 2011, 48 pages
54. Complex Manifolds and Hermitian Differential Geometry
    Andrew D. Hwang | University of Toronto, Published in 1997, 113 pages
55. Ten British Mathematicians
    Alexander Macfarlane | , Published in 1916, 108 pages
56. Introduction to Dynamical Systems: A Hands-on Approach with Maxima
    Jaime E. Villate | , Published in 2006, 43 pages
57. Global Analysis: Functional Analysis Examples
    Leif Mejlbro | BookBoon, Published in 2009, 78 pages
58. Geometry of Numbers with Applications to Number Theory
    Pete L. Clark | University of Georgia, Published in 2013, 138 pages
59. Symplectic, Poisson, and Noncommutative Geometry
    Tohru Eguchi, et al. | Cambridge University Press, Published in 2014, 290 pages
60. Matrix Analysis
    Steven J Cox | Rice University, Published in 2012, 98 pages
61. Geometric Theorems and Arithmetic Functions
    Jozsef Sandor | American Research Press, Published in 2002, 55 pages
62. Yet Another Calculus Text
    Dan Sloughter | , Published in 2007, 147 pages
63. Intuitionistic Logic
    Nick Bezhanishvili, Dick de Jongh | Universiteit van Amsterdam, Published in 2010, 57 pages
64. Calculus Volume 3
    | OpenStax, Published in 2016, 1032 pages
65. Computational Modeling and Mathematics Applied to the Physical Sciences
    | National Academy Press, Published in 1984, 108 pages
66. Natural Operations in Differential Geometry
    Ivan Kolar, Peter W. Michor, Jan Slovak | Springer, Published in 1993, 437 pages
67. Virtual Polyhedra: The Encyclopedia of Polyhedra
    George W. Hart | , Published in 2000
68. The Geometry of the Sphere
    John C. Polking | Rice University, Published in 2000
69. 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
70. Random Graphs and Complex Networks
    Remco van der Hofstad | Eindhoven University of Technology, Published in 2010, 363 pages
71. Lectures on The Riemann Zeta-Function
    K. Chandrasekharan | Tata Institute of Fundamental Research, Published in 1953, 154 pages
72. Introduction to Mathematical Philosophy
    Bertrand Russell | University of Massachusetts Amherst, Published in 2009, 181 pages
73. Grassmann Algebra
    John Browne | , Published in 2001, 238 pages
74. Functors and Categories of Banach Spaces
    Peter W. Michor | Springer, Published in 1978, 103 pages
75. Applied Analysis
    I.M. Sigal, M. Merkli | University of Toronto, Published in 2001, 176 pages
76. A First Course on Time Series Analysis with SAS
    Michael Falk at al. | University of Wuerzburg, Published in 2011, 364 pages
77. A Concise Introduction to Mathematical Logic
    Wolfgang Rautenberg | Springer, Published in 2009, 131 pages
78. Diophantine Analysis
    R. D. Carmichael | John Wiley & Sons, Published in 1915, 120 pages
79. Numerical Analysis: Theory and Application
    Jan Awrejcewicz | InTech, Published in 2011, 626 pages
80. Real Numbers and Fascinating Fractions
    N. M. Beskin | , Published in 1986
81. Lectures on Curves on Rational and Unirational Surfaces
    Masayoshi Miyanishi | Tata Institute of Fundamental Research, Published in 1978, 267 pages
82. An Introduction to Microlocal Analysis
    Richard B. Melrose, Gunther Uhlmann | MIT, Published in 2008, 182 pages
83. The Calculus for Beginners
    John William Mercer | Cambridge University Press, Published in 1914, 470 pages
84. College Trigonometry
    Carl Stitz, Jeff Zeager | Stitz Zeager Open Source Mathematics, Published in 2013, 398 pages
85. Manifolds
    Neil Lambert | King's College London, Published in 2011, 59 pages
86. Basic Algebra
    Anthony W. Knapp | , Published in 2016, 762 pages
87. Ends of Complexes
    Bruce Hughes, Andrew Ranicki | Cambridge University Press, Published in 2008, 375 pages
88. Calculus with Analytic Geometry
    Richard H. Crowell, William E. Slesnick | W W Norton & Co Inc, Published in 2008, 662 pages
89. Lectures On Irregularities Of Distribution
    Wolfgang M. Schmidt | Tata Institute of Fundamental Research, Published in 1977, 137 pages
90. Notes on Differential Geometry
    Noel J. Hicks | Van Nostrand, Published in 1965, 183 pages
91. Introduction to Numerical Methods
    Jeffrey R. Chasnov | The Hong Kong University, Published in 2012, 63 pages
92. Lectures on the topological recursion for Higgs bundles and quantum curves
    Olivia Dumitrescu, Motohico Mulase | arXiv, Published in 2015, 69 pages
93. Basic Concepts in Modal Logic
    Edward N. Zalta | Stanford University, Published in 2011, 92 pages
94. Abelian Categories: an Introduction to the Theory of Functors
    Peter Freyd | Harper and Row, Published in 1964, 192 pages
95. Vector Calculus
    Michael Corral | Schoolcraft College, Published in 2008, 222 pages
96. Introduction to Probability and Statistics Using R
    G. Jay Kerns | , Published in 2010, 412 pages
97. Elementary Differential Geometry
    Gilbert Weinstein | UAB, Published in 2009, 62 pages
98. Lectures on Discrete Subgroups of Lie Groups
    G.D. Mostow | Tata Institute of Fundamental Research, Published in 1969, 86 pages
99. Street-Fighting Mathematics
    Sanjoy Mahajan | The MIT Press, Published in 2010, 153 pages
100. Banach Spaces of Analytic Functions
     enneth Hoffman | Prentice-Hall, Published in 1962, 242 pages
101. Lectures on Torus Embeddings and Applications
     Tadao Oda | Tata Institute of Fundamental Research, Published in 1978, 158 pages
102. Introduction to Lie Groups and Lie Algebras
     Alexander Kirillov, Jr. | SUNY at Stony Brook, Published in 2010, 136 pages
103. Advanced Geometry for High Schools: Synthetic and Analytical
     A.H. McDougall | Copp, Clark, Published in 1919, 236 pages
104. Introduction to Algebraic Topology and Algebraic Geometry
     U. Bruzzo | , Published in 2008, 138 pages
105. Axiomatic Set Theory
     Michael Meyling | , Published in 2011, 36 pages
106. Advanced High School Statistics
     David M Diez, et al. | OpenIntro, Published in 2017, 458 pages
107. An Introduction to Set Theory
     William A. R. Weiss | University of Toronto, Published in 2008, 119 pages
108. Men of Mathematics
     E.T. Bell | Archive.org, Published in 1937
109. The Story of Euclid
     W. B. Frankland | George Newnes, Published in 1902, 183 pages
110. Comparison Geometry
     Karsten Grove, Peter Petersen | Cambridge University Press, Published in 1997, 262 pages
111. Applied Combinatorics
     S. E. Payne | University of Colorado, Published in 2003, 216 pages
112. Introduction to Mathematical Logic
     Vilnis Detlovs, Karlis Podnieks | University of Latvia, Published in 2014, 240 pages
113. Manifold Theory
     Peter Petersen | UCLA, Published in 2010, 77 pages
114. Hopf Algebras in General and in Combinatorial Physics: a practical introduction
     G.H.E. Duchamp, et al. | arXiv, Published in 2008, 40 pages
115. Notes on Galois Theory
     Mark Reeder | Boston College, Published in 2012, 66 pages
116. Advances in Discrete Differential Geometry
     Alexander I. Bobenko (ed.) | Springer, Published in 2016, 439 pages
117. The Handbook of Essential Mathematics
     John C. Sparks | Air Force Publication, Published in 2006, 205 pages
118. Noncommutative Geometry, Quantum Fields and Motives
     Alain Connes, Matilde Marcolli | American Mathematical Society, Published in 2007, 705 pages
119. Random Matrix Models and Their Applications
     Pavel Bleher, Alexander Its | Cambridge University Press, Published in 2001, 438 pages
120. Probability Theory
     Curtis T. McMullen | Harvard University, Published in 2011, 98 pages
121. Lectures on Exterior Differential Systems
     M. Kuranishi | Tata Institute of Fundamental Research, Published in 1962, 117 pages
122. Tensors and Relativity
     Peter Dunsby | , Published in 2004, 203 pages
123. Topics in dynamics I: Flows
     Edward Nelson | Princeton University Press, Published in 1969, 122 pages
124. Why are Braids Orderable?
     Patrick Dehornoy, at al. | , Published in 2010, 206 pages
125. Geometry Unbound
     Kiran S. Kedlaya | , Published in 2006, 142 pages
126. Elementary Theory of Numbers
     Waclaw Sierpinski | ICM, Published in 1964, 516 pages
127. A Course in Combinatorial Optimization
     Alexander Schrijver | University of Amsterdam, Published in 2012, 221 pages
128. Lectures On Unique Factorization Domains
     P. Samuel | Tata Institute Of Fundamental Research, Published in 1964, 68 pages
129. The Hauptvermutung Book: A Collection of Papers on the Topology of Manifolds
     A.A. Ranicki, et al, | Springer, Published in 1996, 194 pages
130. Elementary Set Theory with a Universal Set
     Randall Holmes | , Published in 2005, 240 pages
131. CK-12 Algebra I
     Andrew Gloag, Anne Gloag | CK-12 Basic Algebra Concepts, Published in 2010, 825 pages
132. Introduction to Partial Differential Equations
     John Douglas Moore | UCSB, Published in 2003, 169 pages
133. Complex Geometry of Nature and General Relativity
     Giampiero Esposito | arXiv, Published in 1999, 229 pages
134. Smarandache Rings
     W. B. Vasantha Kandasamy | American Research Press, Published in 2002, 222 pages
135. Stochastic Analysis - Notes
     I. F. Wilde | , Published in 2009, 103 pages
136. Multivariable Calculus
     Jerry Shurman | Reed College, Published in 2010, 413 pages
137. Multiplication of Vectors and Structure of 3D Euclidean Space
     Miroslav Josipovic | viXra, Published in 2016, 70 pages
138. Elements of the Differential and Integral Calculus
     William Anthony Granville | Ginn, Published in 1911, 493 pages
139. Problems with and Without ... Problems!
     Florentin Smarandache | viXra, Published in 2011, 136 pages
140. Thin Groups and Superstrong Approximation
     Emmanuel Breuillard, Hee Oh (eds.) | Cambridge University Press, Published in 2014, 362 pages
141. Introduction to Vectors
     Christopher C. Tisdell | Bookboon, Published in 2014, 68 pages
142. Special Functions, a Review
     S. Arfaoui, I. Rezgui, A.B. Mabrouk | viXra, Published in 2016, 69 pages
143. Linear Algebra for Informatics
     José Figueroa-O'Farrill | The University of Edinburgh, Published in 2005, 69 pages
144. A Problem Text in Advanced Calculus
     John M. Erdman | Portland State University, Published in 2008, 377 pages
145. Introduction To Finite Mathematics
     J. G. Kemeny, J. L. Snell, G. L. Thompson | Prentice-Hall, Published in 1974
146. Pluckings from the tree of Smarandache: Sequences and functions
     Charles Ashbacher | American Research Press, Published in 1998, 80 pages
147. A defense of Columbo: A multilevel introduction to probabilistic reasoning
     G. D'Agostini | arXiv, Published in 2010, 60 pages
148. Calculus I
     Paul Dawkins | Lamar University, Published in 2011, 586 pages
149. Theory of Probability: A Historical Essay
     Oscar Sheynin | arXiv.org, Published in 2017, 316 pages
150. Algebraic Invariants
     Leonard E. Dickson | J. Wiley & Sons, Published in 1914, 122 pages
151. Theory of Groups of Finite Order
     William Burnside | Cambridge University Press, Published in 1897, 456 pages
152. Calculus II
     Paul Dawkins | Lamar University, Published in 2011, 380 pages
153. Modular Functions and Modular Forms
     J. S. Milne | , Published in 2009, 129 pages
154. Invitation to Dynamical Systems
     Edward R. Scheinerman | Prentice Hall College Div, Published in 2000, 384 pages
155. A First Course in Ordinary Differential Equations
     Norbert Euler | Bookboon, Published in 2015, 232 pages
156. Ordinary Differential Equations and Dynamical Systems
     Gerald Teschl | Universitaet Wien, Published in 2009, 297 pages
157. Real Analysis
     Martin Smith-Martinez, et al. | Wikibooks, Published in 2013
158. Riemannian Geometry: Definitions, Pictures, and Results
     Adam Marsh | arXiv, Published in 2014, 69 pages
159. A Concise Geometry
     Clement V. Durell | G. Bell And Sons Limited., Published in 1921, 333 pages
160. Learning Statistics with R
     Daniel Navarro | University of Adelaide, Published in 2014, 564 pages
161. Semi-Riemann Geometry and General Relativity
     Shlomo Sternberg | , Published in 2003, 251 pages
162. Singularities of Transition Processes in Dynamical Systems
     Alexander N. Gorban | American Mathematical Society, Published in 2004, 55 pages
163. Basics of Algebra and Analysis For Computer Science
     Jean Gallier | , Published in 2007, 254 pages
164. Applied Analysis
     J. Hunter, B. Nachtergaele | World Scientific Publishing Company, Published in 2005, 439 pages
165. Commutative Algebra
     Keerthi Madapusi | Harvard University, Published in 2007, 177 pages
166. Practical Trigonometry
     H. C. Playne | E. Arnold, Published in 1906, 188 pages
167. Introduction to Infinitesimal Analysis: Functions of One Real Variable
     N. J. Lennes | John Wiley & Sons, Published in 1907, 225 pages
168. Group Characters, Symmetric Functions, and the Hecke Algebra
     David M. Goldschmidt | American Mathematical Society, Published in 1993, 69 pages
169. Sets, Relations, Functions
     Ivo Düntsch, Günther Gediga | Methodos Publishers (UK), Published in 2000, 55 pages
170. Programming for Computations - Python
     Svein Linge, Hans Petter Langtangen | Springer, Published in 2016, 232 pages
171. Knot Diagrammatics
     Louis H. Kauffman | arXiv, Published in 2004, 107 pages
172. Real Analysis for Graduate Students: Measure and Integration Theory
     Richard F. Bass | CreateSpace, Published in 2011, 206 pages
173. Mathematical Methods of Engineering Analysis
     Erhan Cinlar, Robert J. Vanderbei | , Published in 2000, 119 pages
174. A First Course in Topology: Continuity and Dimension
     John McCleary | American Mathematical Society, Published in 2006, 210 pages
175. Galois Groups and Fundamental Groups
     Leila Schneps | Cambridge University Press, Published in 2003, 467 pages
176. Triangles, Rotation, a Theorem and the Jackpot
     Dave Auckly | arXiv, Published in 2013, 43 pages
177. Noncommutative Localization in Algebra and Topology
     Andrew Ranicki | Cambridge University Press, Published in 2002, 323 pages
178. Spectral Theory of Partial Differential Equations
     Richard S. Laugesen | arXiv, Published in 2012, 120 pages
179. One Variable Advanced Calculus
     Kenneth Kuttler | Brigham Young University, Published in 2018, 327 pages
180. Jordan Operator Algebras
     Harald Hanche-Olsen, Erling Størmer | Pitman, Published in 1984, 216 pages
181. Calculus and Linear Algebra. Vol. 2
     Wilfred Kaplan, Donald J. Lewis | University of Michigan Library, Published in 2007, 606 pages
182. Differential Topology and Morse Theory
     Dirk Schuetz | University of Sheffield, Published in 2009, 96 pages
183. Introduction to Topology
     Alex Kuronya | , Published in 2010, 102 pages
184. Combinatorial and Computational Geometry
     J. E. Goodman, J. Pach, E. Welzl | Cambridge University Press, Published in 2007, 616 pages
185. A Feel for Statistics
     Ivan Lowe | scientificlanguage.com, Published in 2016, 121 pages
186. Stability, Riemann Surfaces, Conformal Mappings: Complex Functions Theory a-3
     Leif Mejlbro | BookBoon, Published in 2010, 115 pages
187. Numbers and Symbols: From Counting to Abstract Algebras
     Roy McWeeny | Learning Development Institute, Published in 2007, 53 pages
188. Galois Lectures
     J. Douglas, P. Franklin, C.J. Keyser, L. Infeld | Morrill Press, Published in 1941, 141 pages
189. Dave's Short Course in Trigonometry
     David E. Joyce | Clark University, Published in 2002
190. A Short Course on Approximation Theory
     N. L. Carothers | Bowling Green State University, Published in 2009, 159 pages
191. Contributions to Fourier Analysis
     A. Zygmund, et al. | Princeton University Press, Published in 1950, 207 pages
192. An Introduction to Good Old Fashioned Model Theory
     Harold Simmons | The University of Manchester, Published in 2004, 180 pages
193. Lectures on Numerical Methods in Bifurcation Problems
     H.B. Keller | Tata Institute Of Fundamental Research, Published in 1986, 140 pages
194. Foliations and the Geometry of 3-manifolds
     Danny Calegari | Oxford University Press, Published in 2007, 371 pages
195. Computable Integrability
     Alexey Shabat, Elena Kartashova | arXiv, Published in 2011, 174 pages
196. Complex Analysis
     Christian Berg | Kobenhavns Universitet, Published in 2012, 192 pages
197. Rotations of Vectors Via Geometric Algebra
     James A. Smith | viXra, Published in 2016, 76 pages
198. Strings and Geometry
     M. Douglas, J. Gauntlett, M. Gross | American Mathematical Society, Published in 2004, 384 pages
199. Practical Mathematics for Home Study
     Claude Irwin Palmer | McGraw-Hill, Published in 1919, 528 pages
200. Lectures on Introduction to Algebraic Topology
     G. de Rham | Tata Institute of Fundamental Research, Published in 1969, 71 pages
201. Mixed Motives
     Marc Levine | American Mathematical Society, Published in 1998, 523 pages
202. Transmutations and Applications: a survey
     Sergei M. Sitnik | arXiv, Published in 2010, 141 pages
203. scl
     Danny Calegari | Mathematical Society of Japan, Published in 2009, 218 pages
204. Lectures on Holomorphic Curves in Symplectic and Contact Geometry
     Chris Wendl | arXiv, Published in 2010, 153 pages
205. Introduction to Graphs
     | Wikipedia, Published in 2014
206. Category Theory Lecture Notes
     Michael Barr, Charles Wells | , Published in 1999, 133 pages
207. Non-Euclidean Geometry
     Henry Manning | Ginn and Company, Published in 1901, 93 pages
208. Notes on Optimization
     Pravin Varaiya | Van Nostrand, Published in 1972, 140 pages
209. A Concise Course in Algebraic Topology
     J. P. May | University Of Chicago Press, Published in 1999, 251 pages
210. Set Linear Algebra and Set Fuzzy Linear Algebra
     W. B. V. Kandasamy, F. Smarandache, K. Ilanthenral | InfoLearnQuest, Published in 2008, 345 pages
211. Algebraic Geometry
     Andreas Gathmann | University of Kaiserslautern, Published in 2014, 133 pages
212. Real Variables: With Basic Metric Space Topology
     Robert B. Ash | Institute of Electrical & Electronics Engineering, Published in 2007, 213 pages
213. Advanced Data Analysis from an Elementary Point of View
     Cosma Rohilla Shalizi | Cambridge University Press, Published in 2013, 586 pages
214. Lectures on Representations of Complex Semi-Simple Lie Groups
     Thomas J. Enright | Tata Institute of Fundamental Research, Published in 1981, 94 pages
215. An Elementary Treatise on Conic Sections
     Charles Smith | The Macmillan Company, Published in 1905, 378 pages
216. The Design of Approximation Algorithms
     D. P. Williamson, D. B. Shmoys | Cambridge University Press, Published in 2010, 496 pages
217. Introductory Finite Difference Methods for PDEs
     D. M. Causon, C. G. Mingham | BookBoon, Published in 2010, 144 pages
218. An Episodic History of Mathematics
     Steven G. Krantz | Mathematical Association of America, Published in 2006, 483 pages
219. Short introduction to Nonstandard Analysis
     E. E. Rosinger | arXiv, Published in 2004, 197 pages
220. Engineering Mathematics: YouTube Workbook
     Christopher C. Tisdell | BookBoon, Published in 2012, 114 pages
221. Bernoulli Polynomials and Applications
     Omran Kouba | arXiv, Published in 2013, 48 pages
222. Intuitive Infinitesimal Calculus
     Viktor Blasjo | Intellectual Mathematics, Published in 2015, 98 pages
223. Probability on Trees and Networks
     Russell Lyons, Yuval Peres | Cambridge University Press, Published in 2016, 716 pages
224. Distribution of Prime Numbers
     W W L Chen | Macquarie University, Published in 2003, 134 pages
225. Metric and Topological Spaces
     T. W. Körner | University of Cambridge, Published in 2014, 109 pages
226. Geometry of 2D Topological Field Theories
     Boris Dubrovin | arXiv, Published in 1994, 204 pages
227. Algorithmic Number Theory
     J.P. Buhler, P. Stevenhagen | Cambridge University Press, Published in 2008, 662 pages
228. Several Complex Variables
     Michael Schneider, Yum-Tong Siu | Cambridge University Press, Published in 1999, 564 pages
229. Current Developments in Algebraic Geometry
     Lucia Caporaso, et al. | Cambridge University Press, Published in 2012, 438 pages
230. Computational Category Theory
     D.E. Rydeheard, R.M. Burstall | , Published in 2001, 263 pages
231. Combinatorics Through Guided Discovery
     Kenneth P. Bogart | Dartmouth College, Published in 2004, 202 pages
232. An Introduction to Mathematics
     A. N. Whitehead | Williams & Northgate, Published in 1911, 274 pages
233. A Primer of Real Analysis
     Dan Sloughter | Synechism.org, Published in 2009, 152 pages
234. Unfolding the Labyrinth: Open Problems in Mathematics, Physics, Astrophysics
     Florentin Smarandache, at al. | arXiv, Published in 2006, 139 pages
235. Markov Chains and Stochastic Stability
     S.P. Meyn, R.L. Tweedie | Springer, Published in 2005, 567 pages
236. Surfing on the ocean of numbers
     Henry Ibstedt | Erhus University Press, Published in 1997, 76 pages
237. Introduction to Symplectic and Hamiltonian Geometry
     Ana Cannas da Silva | , Published in 2007, 158 pages
238. Introductory Maths for Chemists
     J. E. Parker | Bookboon, Published in 2013, 136 pages
239. Linear Algebra: A Course for Physicists and Engineers
     Arak Mathai,‎ Hans J. Haubold | De Gruyter Open, Published in 2017, 450 pages
240. Applied Stochastic Processes in Science and Engineering
     Matt Scott | University of Waterloo, Published in 2013, 316 pages
241. Differential Equations with YouTube Examples
     Jeffrey R. Chasnov | BookBoon, Published in 2014, 57 pages
242. An Introductory Course in Elementary Number Theory
     Wissam Raji | The Saylor Foundation, Published in 2013, 171 pages
243. Endless Amusement
     | Lea and Blanchard, Published in 1847, 217 pages
244. Lectures on Minimal Surface Theory
     Brian White | arXiv, Published in 2013, 46 pages
245. Topology Without Tears
     Sidney A. Morris | , Published in 2007, 373 pages
246. Exterior Differential Systems
     Robert L. Bryant, et al. | MSRI, Published in 1991, 406 pages
247. Mathematical Measures, Mathematical Pleasures, Mathematical Treasures
     Stephen Clark | Lulu.com, Published in 2008, 48 pages
248. Lectures on Topics In Finite Element Solution of Elliptic Problems
     Bertrand Mercier | Tata Institute of Fundamental Research, Published in 1979, 177 pages
249. Quantitative Analysis: Algebra with a Business Perspective
     Donna M. Wacha | Bookboon, Published in 2013, 303 pages
250. Templates for the Solution of Linear Systems
     Richard Barrett et al. | Society for Industrial Mathematics, Published in 1987, 117 pages
251. Smarandache Semirings, Semifields and Semivector Spaces
     W. B. Vasantha Kandasamy | American Research Press, Published in 2002, 122 pages
252. Notes on Symmetric Spaces
     Jonathan Holland, Bogdan Ion | arXiv, Published in 2012, 109 pages
253. Mathematical Tools for Physics
     James Nearing | Dover Publications, Published in 2010, 569 pages
254. Introductory Statistics: Concepts, Models, and Applications
     David W. Stockburger | Missouri State University, Published in 1996
255. Lectures on Fibre Bundles and Differential Geometry
     J.L. Koszul | Tata Institute of Fundamental Research, Published in 1960, 105 pages
256. Lectures on Topics In One-Parameter Bifurcation Problems
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457. Valuations and Hyperbolicity in Dynamics
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458. Noncommutative Geometry
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