# Blyth Lecture Series

Event Information 24th Annual Blyth Series
16:00 on Wednesday March 27, 2019
17:00 on Wednesday March 27, 2019
BA6183, Bahen Center, 40 St. George St.
Camillo De Lellis

In the fifties John Nash astonished the geometers with his celebrated isometric embedding theorems. A folkloristic explanation of his first theorem is that you should be able to put any piece of paper in your pocket without crumpling or folding it, no matter how large it is. In more precise mathematical terms, while it was long known that sufficiently smooth isometric embeddings must abide some restrictions (the most notable being Gauss' Theorema Egregium), Nash showed that $C^1$ isometric embeddings are surprisingly flexible. A natural question is then whether there is a threshold regularity which discriminates between the two behaviors.