Hacker News
- The Most Imaginary Number Is Real https://divisbyzero.com/2019/03/13/the-most-imaginary-number-is-real/ 3 comments
- What is the difference between a theorem, a lemma, and a corollary? https://divisbyzero.com/2008/09/22/what-is-the-difference-between-a-theorem-a-lemma-and-a-corollary/ 2 comments
- Make Your Own Pythagorean Cup https://divisbyzero.com/2018/12/31/make-your-own-pythagorean-cup/ 22 comments
- Proof Without Words: Gregory’s Theorem https://divisbyzero.com/2018/09/28/proof-without-word-gregorys-theorem/ 26 comments
- Mathematical surprises http://divisbyzero.com/2010/08/18/mathematical-surprises/ 3 comments
- The math behind a neat calculator trick http://divisbyzero.com/2010/02/17/the-math-behind-a-neat-calculator-trick/ 17 comments
- Tennenbaum’s proof of the irrationality of the square root of 2 https://divisbyzero.com/2009/10/06/tennenbaums-proof-of-the-irrationality-of-the-square-root-of-2/ 34 comments math
- Volumes of n-dimensional balls https://divisbyzero.com/2010/05/09/volumes-of-n-dimensional-balls/ 13 comments math
- Solutions of sin(sin(sin(sin(x)))) = cos(cos(cos(cos(x)))), and related problems http://divisbyzero.com/2009/03/09/sines-and-cosines-part-2/ 7 comments math
- Tennenbaum’s proof of the irrationality of the square root of 2 http://divisbyzero.com/2009/10/06/tennenbaums-proof-of-the-irrationality-of-the-square-root-of-2/ 15 comments math
- Different methods to curve grades http://divisbyzero.com/2008/12/22/how-to-curve-an-exam-and-assign-grades/ 44 comments math
- Four good proofs of the countability of the rationals http://divisbyzero.com/2009/09/11/cardinality1-html/ 24 comments compsci
- Beautiful theorems about dynamical systems on the plane http://divisbyzero.com/2011/01/12/beautiful-theorems-about-dynamical-systems-on-the-plane/ 4 comments math
- Proof: The transcendence of e - Step 1 http://divisbyzero.com/2010/09/28/the-transcendence-of-e/ 6 comments math
- Mathematical surprises http://divisbyzero.com/2010/08/18/mathematical-surprises/ 8 comments math
- Goodstein’s Theorem - An example of Gödel’s first incompleteness theorem (not provable using the Peano axioms of arithmetic). http://divisbyzero.com/2010/08/16/goodsteins-unprovable-theorem/ 4 comments math
- The math behind a neat calculator trick http://divisbyzero.com/2010/02/17/the-math-behind-a-neat-calculator-trick/ 6 comments math