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
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