**Abstract**: Everybody knows that nobody can solve the quintic. Indeed it’s a well known hard theorem (the Abel-Ruffini Theorem), the high point of a full-semester course on Galois theory, often taken in one’s 3rd or 4th year of university mathematics. In this talk, we will explore an accessible proof of this famous theorem using basic and easily understandable topology. The level of content should be accessible for most undergraduates in mathematics.

**About the speaker**: Professor Dror Bar-Natan earned his B.Sc at Tel Aviv University in 1984 and later Ph.D. from Princeton University in 1991. Since then, he has taken positions at Harvard University, Hebrew University and UC Berkeley. He is currently a Professor at the University of Toronto.

**What**: Week 3 Talk

**When**: Thursday 17 August, 1 pm – 2 pm

**Where**: New Law **024**

Resources of the talk can be found on Professor Dror Bar-Natan’s website here.