My favorite curves, geodesics, aren't included in this revision of the notes (he says it'll be added to future revisions). But you can download his paper on th

My favorite curves, geodesics, aren't included in this revision of the notes (he says it'll be added to future revisions). But you can download his paper on them at http://www.cs.columbia.edu/~keenan/Projects/GeodesicsInHeat/paper.pdf http://www.cs.columbia.edu/~keenan/Projects/GeodesicsInHeat/...