23 Jun
2019
23 Jun
'19
6:59 p.m.
Hi Adam, I don't know about your beautiful theorems, but do consider this lemma obvious. The Law of Sines can be applied to obtuse triangles in the infinitesimal limit, while the tangent vectors of the thinner ellipse flatten out more readily. Cheers, Brad On Sun, Jun 23, 2019 at 7:09 PM Adam P. Goucher <apgoucher@gmx.com> wrote:
Excellent proof!
By the way, for the 'obvious' lemma that the girth is an increasing function of the two semi-axes, it follows from: