cohomology

# Contents

## Idea

One says ordinary cohomology for the cohomology theory represented by the Eilenberg-MacLane spectrum $K\left(𝔸\right)$ for some abelian group $A$.

This is to distinguish from more general notions of cohomology, such as generalized (Eilenberg-Steenrod) cohomology and nonabelian cohomology.

## Properties

Ordinary cohomology is modeled by singular cohomology.

Revised on August 31, 2012 16:54:52 by Urs Schreiber (89.204.139.6)