OIST Representation Theory Seminar

Alice Dell'Arciprete, University of East Anglia

Title: Scopes equivalence for blocks of Ariki-Koike algebras

Abstract: We consider representations of the Ariki-Koike algebra, a $q$-deformation of the group algebra of the complex reflection group $C_r \wr S_n$. The representations of this algebra are naturally indexed by multipartitions of $n$. We examine blocks of the Ariki-Koike algebra, in an attempt to generalise the combinatorial representation theory of the Iwahori-Hecke algebra. In particular, we prove a sufficient condition such that restriction of modules leads to a natural correspondence between the multipartitions of $n$ whose Specht modules belong to a block $B$ and those of $n-\delta_i(B)$ whose Specht modules belong to the block $B'$, obtained from $B$ applying a Scopes' equivalence.

Zoom info can be found on the seminar webpage.