Mathematics Wiskunde

Tuesday 5 February 2019

Euler classes and Two-Dimensional Topological Quantum Field Theory

Speaker: Hosana Valimbavaka Ranaivomanana
Time: 14:00
Venue: Room 1006, Mathematical Sciences/Industrial Psychology

My thesis investigates the relationship between the handle element of the De Rham cohomology algebra of a compact oriented smooth manifold, thought of as a Frobenius algebra, and the Euler class of the manifold. In this way it gives a complete answer to an exercise posed in the monograph of Kock (which is based on a paper of Abrams), where one is asked to show that these two classes are equal. Firstly, an overview of De Rham cohomology, Thom and Euler classes of smooth manifolds, Poincaré duality, Frobenius algebras, and their graphical calculus is given. Finally, it is shown that the handle element and the Euler class are indeed equal for even-dimensional manifolds. However, they are not equal for odd-dimensional manifolds.