Bockstein homomorphisms for Hochschild cohomology of group algebras and of block algebras of finite groups (Q524714)

The paper is devoted to connecting homomorphisms (also called Bockstein homomorphisms) in the long exact cohomological sequence associated with a short exact sequence of module coefficients in the Hochschild cohomology of group algebras of finite groups, and block algebras of group algebras. In particular, it is shown that this Hochschild cohomology has a structure of a dg-algebra with respect to the suitable Bockstein homomorphisms.