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Simon Willerton: "Two 2-traces"

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Published on May 1, 2012

Speaker: Simon Willerton (University of Sheffield)
Title: Two 2-traces
Event: Categories, Logic and Foundations of Physics III (August 2008, University of Oxford)

Abstract: In a monoidal category there is a notion of a trace for certain types of endomorphisms for example the trace of an endomorphism of a finite dimensional vector space. In a monoidal bicategory there are two different notions of trace for endomorphisms which in various cases are 'dual'; I will describe these traces diagrammatically. Several examples from assorted areas will be given and I hope that the audience will come up with some more.

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