An elementary approach to the Poincaré Conjecture

Spiros Adams-Florou

Friday 19th January, 2018 16:00-17:00 Maths 311B


Spoiler alert - I do not have an elementary proof of the Poincaré Conjecture!

In this talk I will do an unusual thing in discussing a project that did not work, as it provides some insight into why the Poincaré Conjecture is difficult!
The talk is primarily concerned with studying simplicial maps with contractible point inverses and when they are homotopic to piecewise linear (p.l.) homeomorphisms. This will be related to the (strong) p.l. Poincaré Conjecture that asserts that every p.l. homotopy sphere is a p.l. sphere. I will also explain what can actually be proved with these techniques.
I am to make the talk very accessible and there will be lots of pictures!

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