Thanks for this Jim... I still have nightmares about delta-epsilon proofs, so it’s nice to see something less complicated for once. Compare and contrast with Liouville’s Theorem for entire holomorphic functions could make for a nice follow up. Though, if the game is on calculus in general, then Liouville’s other Theorem on phase volumes—that a Hamiltonian flow leaves volume a constant function, V(t)=V(0)— could raise even more interest. Every physicist encounters the n-dimensional cartesian case in statistical mechanics; however, I have searched and found almost nothing about the 2D case on phase sphere or phase hyperboloid, as opposed to the usual phase plane. (Or am I missing something?) More cheers for calculus! So much fun! —Brad
On Jul 11, 2019, at 12:58 PM, James Propp <jamespropp@gmail.com> wrote:
Oops, forgot to include the link to the essay! It's
http://mathenchant.org/051-draft3.pdf
Jim
On Thu, Jul 11, 2019 at 1:57 PM James Propp <jamespropp@gmail.com> wrote:
This month I plan to publish a Mathematical Enchantments essay on the 14th, rather than the 17th, so that I can link to it in my third pitch for Christian's Big Internet Math-Off on the 15th. But as always comments are welcome at any time since it's easy to make edits in WordPress.
The podcast episode I refer to can be heard at
https://kpknudson.com/my-favorite-theorem/2019/7/10/episode-44-james-propp
but the essay is designed to stand on its own.
Thanks,
Jim Propp
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