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math.QA2009★ 11 cited
Pointed Hopf algebras over some sporadic simple groups
N. Andruskiewitsch, F. Fantino, M. Graña +1
Any finite-dimensional complex pointed Hopf algebra with group of group-likes isomorphic to a sporadic group, with the possible exception of the Fischer groups Fi22, the Baby Monst…
math.QA2009
On pointed Hopf algebras associated with the symmetric groups II
N. Andruskiewitsch, F. Fantino, M. Graña +1
This is a sequel to arXiv:0807.2406. It is shown that the Nichols algebras over the symmetric groups S_m, m > 4, are all infinite-dimensional, except (maybe) those related to the t…