Proceedings of the American Mathematical Society, Vol. 123, No. 10 (Oct., 1995), pp. 3243-3250 (8 pages) Let h be a free homeomorphism with a finite set of fixed points on a compact surface. Then h is ...

I have very fond memories of high school geometry. Memorizing theorems wasn't too hard, and solving proofs was like solving the logic puzzles that I did for fun anyway. But the theorems were scattered ...

Emmy Noether showed that fundamental physical laws are just a consequence of simple symmetries. A century later, her insights continue to shape physics. In the fall of 1915, the foundations of physics ...