Jerusalem Mathematics Colloquium

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Thursday, 5th December 2002, 4:00 pm
Mathematics Building, Lecture Hall 2

Florian Deloup

Quadratic functions, Spin structures and low-dimensional topology

Abstract: Ever since the beginning of algebraic topology, quadratic forms have played a prominent rôle. For instance, on surfaces, there is a very nice interpretation of quadratic forms as spin structures.

There is a new analog in dimension three: complex spin structures embed into the space of quadratic functions over the linking pairing. Consequences and connections with invariants of 3-manifolds will be also be discussed.

Light refreshments will be served in the faculty lounge at 3:30.

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