### Description

A group blog on math, physics and philosophy

### The n-Category Café's Latest Posts

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Every compact ring is totally disconnected.

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Todd Trimble's note on 'the super Brauer group and super division algebras', reprinted.

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A detailed introduction to the Brauer--Wall monoid, which gives an algebraic explanation of the ten-fold way.

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A geometric construction, used in combinatorial optimization and phylogenetic analysis, interpreted categorically.

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My introduction to category theory has just been published.

### Tags