Today we updated the Index, Fall Harvest Edition, JKU Part Deux, The Free List, the VideoList, and the Cold List.

Find them here: Jae Kamel’s URLs, Part Deux. 44 more words

Today we updated the Index, Fall Harvest Edition, JKU Part Deux, The Free List, the VideoList, and the Cold List.

Find them here: Jae Kamel’s URLs, Part Deux. 44 more words

There’s a lot more to Geometry than congruent triangles. Geometry can generate hurricanes and slam you to the floor.

It all starts (of course) with Newton. 696 more words

An isometry is a map between two metric spaces which preserves all distances: for all . (After typing a bunch of such formulas, one tends to prefer shorter notation: , with the metric inferred from contexts.) It’s a popular exercise to prove that every isometry from a compact metric space into itself is surjective. 355 more words