Hacker News
- The Saga of Springer-Verlag and Volume II of Mumford’s Selecta [pdf] https://www.math.upenn.edu/~chai/story/story18.pdf 2 comments
- Elementary Applied Topology (2014) https://www.math.upenn.edu/~ghrist/notes.html 40 comments
- Combinatorial Algorithms (1978) [pdf] https://www.math.upenn.edu/~wilf/website/CombinatorialAlgorithms.pdf 6 comments
- Generatingfunctionology (1989) [pdf] http://www.math.upenn.edu/~wilf/gfologyLinked2.pdf 5 comments
- Elementary Applied Topology http://www.math.upenn.edu/~ghrist/notes.html 2 comments
- The Book "A=B" - now downloadable http://www.math.upenn.edu/~wilf/AeqB.html 13 comments
- Illustrated Calculus Textbook http://www.math.upenn.edu/~ghrist/FLCT/ 35 comments
- For those wanting to learn the maths behind machine learning... https://www.math.upenn.edu/~ghrist/BLUE.html#VOL1 45 comments learnmachinelearning
- Having trouble understanding a proof. https://www.math.upenn.edu/~ghrist/preprints/persistent.pdf 6 comments math
- An Interview with VI ARNOLD https://www.math.upenn.edu/arnold/arnold-interview1997.pdf 4 comments math
- Generatingfunctionology - A phenomenally well written text book on the far-reaching applications of generating functions https://www.math.upenn.edu/~wilf/gfologylinked2.pdf 23 comments math
- Dennis Gaitsgory teaching determinants | Old Harvard Magazine Article http://www.math.upenn.edu/~aaronsil/math312spring2013/gaitsgory.pdf 20 comments math
- Robert Ghrist's *Elementary Applied Topology* (free online book from author's homepage) http://www.math.upenn.edu/~ghrist/notes.html 21 comments math
- Funny Little Calculus Text http://www.math.upenn.edu/~ghrist/flct/flct.pdf 29 comments math
- Robert Ghrist's "Funny Little Calculus Text" http://www.math.upenn.edu/~ghrist/flct/ 8 comments math
- Cartoon Calculus Book (a work in progress) http://www.math.upenn.edu/~ghrist/flct/flctchapter2.pdf 13 comments math
- Math undergraduates, doing this will improve your schooling experience tenfold. http://www.math.upenn.edu/~wilf/DownldGF.html 72 comments math
- Epsilon Sandwiches, or "Proof" Is Not The Only Hard Part of "Proof Writing" -- Herbert Wilf http://www.math.upenn.edu/~wilf/website/maaspeech 16 comments math
- A generating function is a way to keep track of a lot of related numbers all at once... The study of generating functions is an art and a science known as 'generatingfunctionology,' and its bible is free for all to download. http://www.math.upenn.edu/~wilf/downldgf.html 6 comments math
- Recounting the Rationals [PDF] http://www.math.upenn.edu/~wilf/website/recounting.pdf 4 comments math
- A = B, a free book on identities, computer discovery and proof, by Petkovsek, Wilf and Zeilberger http://www.math.upenn.edu/~wilf/downld.html 6 comments math