Inner simplicity vs. outer simplicity
Étienne Ghys, École Normale Supérieure, Lyon
09:10-09:50 Wednesday April 3

I have always been struck by the fact that some mathematical ideas or theorems are crystal clear for me and very difficult to explain to others. Understanding and explaining are different concepts, especially in maths. As a result, one can distinguish two notions of simplicity. I will discuss some examples...