Holmstrom Monad cohomology

Monad cohomology

There is an abstract gadget called monad, which can be used to define cohomology and homology theories.


Monad cohomology

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Monad cohomology

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Monad cohomology

http://ncatlab.org/nlab/show/monadic+cohomology

Quote from the n-category cafe:

It’s sometimes called the bar construction. Eilenberg and Mac Lane first used that phrase for a special case, but it applies very generally: you get simplicial sets from any algebraic gadget described by a monad.

People usually turn these simplicial sets into simplicial groups, then turn those into chain complexes, and then take their cohomology. This is sometimes called ‘monad cohomology’ — or, since monads are also called triples, ‘triple cohomology’. This subsumes group cohomology, Lie algebra cohomology, Hochschild cohomology, etc..

This might be a good place to start: J.W. Duskin, Simplicial methods and the interpretation of “monad” cohomology, Mem. Amer. Math. Soc., 3 (1975).

Or, take this course! Monad cohomology is the main thing I’ll be talking about.

nLab page on Monad cohomology

Created on June 10, 2014 at 21:14:54 by Andreas Holmström