The shift action on 2-cocycles.
This paper is a very interesting one at least for the applications concerning representation theory, combinatorial design and quantum dynamics. Introducing shift actions from a group \(G\) on the group of 2-cocycles from \(G \) to an Abelian group \(C\), there are obtained stronger equivalence relations than does cohomology. In the last section there is also given a very nice application to digital signal design.
scientific article; zbMATH DE number 2056249