In this post we will talk about the basic theory of group cohomology, including the cohomology of profinite groups.

We will assume that the reader is familiar with the basic theory of derived functors as in, say, Weibel’s *Homological Algebra*.

In this post we will talk about the basic theory of group cohomology, including the cohomology of profinite groups.

We will assume that the reader is familiar with the basic theory of derived functors as in, say, Weibel’s *Homological Algebra*.