I made a page about rational trigonometry, an idea proposed by N.J. Wildberger in his book about divine proportions. Before you go to the page, try to find the height h of the following triangle, and the length of the angle bisector d, both as...

I created a page with a description of the installation of Latex for Windows.

Just recently I heard a radio interview with some German professor of math about votes and seats, and the problem to compute the distribution of the seats from the votes. The radio woman correctly identified the problem as the fractions, which occur...