Hochschild cohomology and the coradical filtration of pointed coalgebras: Applications

[摘要] In this paper we show that there is a close connection between the coradical filtration of a pointed coalgebra and the Hochschild cohomology of that coalgebra with coefficients in some one-dimensional bicomodules. As an application, for a given prime number p and an algebraically closed field k of characteristic 0, we classify all pointed Hopf algebras of dimension p(3) over k. (C) 1998 Academic Press.

[发布日期] 1998-12-15