Pointed Hopf algebras and Quasi-isomorphisms
arXiv:math/0201276
Abstract
We show that a large class of finite dimensional pointed Hopf algebras is quasi-isomorphic to their associated graded version coming from the coradical filtration, i.e. they are 2-cocycle deformations of the latter. This supports a slightly specialized form of a conjecture of Masuoka.
19 pages, added section with new result, rest mainly unchanged