cohomology

# Contentens

## Idea

The twisted cohomology version of ordinary cohomology.

## References

Discussion of classification by fibrations of Eilenberg-MacLane spaces:

Discussion of cohomology operations in twisted ordinary cohomology:

• Samuel Gitler, Cohomology Operations with Local Coefficients, American Journal of Mathematics Vol. 85, No. 2 (Apr., 1963), pp. 156-188 (jstor:2373208)