Ex-infinity

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• Sean Moss (DPMMS)
• Tuesday 03 March 2015, 14:15-15:15
• MR3, Centre for Mathematical Sciences.

If you have a question about this talk, please contact Dr Ignacio Lopez Franco.

Kan’s Ex-infinity functor provides us with a completely combinatorial fibrant replacement for the Quillen model structure on simplicial sets. I will present a new viewpoint on anodyne extensions, i.e. the trivial cofibrations of this model structure. This will allow us to develop the theory of Ex-infinity, and indeed prove the existence of the model structure, in a simple and elementary way.

This talk is part of the Category Theory Seminar series.

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