
School of Mathematics and Statistics
Eric Ragoucy
Université de Savoie
QuasiHopf algebras and deformations of
double Yangians.
Friday November 16, 121pm,
Carslaw 375.
We start with the notion of Hopf and quasiHopf
algebras. We first present a description of the
different algebraic structures one can obtain from a
Lie algebra (typically sl(N) or affine sl(N)). Apart
from the known elliptictype algebras, the deformed
double Yangians appear in the scheme.
We then focus on these latter and emphasize their
quasitriangular quasiHopf structure. For such a
purpose, the relevant approch appears to be the
construction of a Drinfeld twist.
