Hi<p>I have an ambition to write a book about "The Mechanics of Abstract Endeavors" in the next few years, as soon as I finish my Ph.D. To that end, over the last year or so, I've written about fourty or so essays on Medium about various math-related topics, to get into the rhythm and habit of writing daily.<p>Several of these essays have been featured on the front page of HN and relevant subreddits (except /r/math, they hate me), including:<p>1. "The Unparalleled Genius of John von Neumann";
2. "Einstein and Hilbert's Race to Generalize Relativity";
3. "Uncomputable Numbers";
4. "The Mathematical Nomad, Paul Erdos";
5. "The Math behind that Dick Joke in HBO's Silicon Valley";
6. "The Black-Scholes Formula, explained"; and many more.<p>I still want to write more essays and have a bunch of ideas for topics. My next long essay will be a biography of Norbert Wiener, tentatively entitled "The Absent-Minded Father of Cybernetics, Norbert Wiener".<p>However, these take a fair while to write and of course are hit and miss with the HN audience, so I figured I'd head straight to the source, and ask:<p>- What math essay would you love to read that you still haven't read?<p>Thanks a bunch, you guys/girls are the best!