Cohomology of a Hopf algebra over \(Z_ 2\)
The author considers a particular Hopf algebra A over \(Z_ 2\), which is related to group schemes. He gives an acyclic resolution of \(Z_ 2\) by A-comodules (this result is credited to M. Tezuka, unpublished), and he computes \(Ext_{A*}(Z_ 2,Z_ 2)\) and \(Cotor^ A(Z_ 2,Z_ 2)\).
scientific article; zbMATH DE number 4133137