1.
3.
Byrne's Euclid
(news.ycombinator.com)
4.
Binary GCD
(news.ycombinator.com)
5.
Algebraic topology: knots links and braids
(news.ycombinator.com)
7.
An interactive version of Byrne's The Elements of Euclid (1847)
(news.ycombinator.com)
8.
Dancing around the rhythm space with Euclid
(news.ycombinator.com)
9.
What is a manifold?
(news.ycombinator.com)