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math.QA2000
Dynamical Weyl groups and applications
Pavel Etingof, Alexander Varchenko
Following a preceding paper of Tarasov and the second author, we define and study a new structure, which may be regarded as the dynamical analogue of the Weyl group for Lie algebra…
math.QA2000
On cotriangular Hopf algebras
Pavel Etingof, Shlomo Gelaki
In 1997 we proved that any triangular semisimple Hopf algebra over an algebraically closed field k of characteristic 0 is obtained from the group algebra k[G] of a finite group G,…