The n-Category Café
A group blog on math, physics and philosophy
The n-Category Café's Latest Posts
Defining classifying spaces as full sub-groupoids of a universe can give an easier way to define morphisms between them.
Letter in the Notices of the AMS.
Perform a magic trick using the power of maths.
There are some easy ways to get braided 2-groups from lattices.
Mumford's obituary of Grothendieck was rejected by _Nature_.
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