Title of article :
Tabloids and weighted sums of characters of certain modules of the symmetric groups
Author/Authors :
Numata، نويسنده , , Yasuhide، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Abstract :
We consider certain modules of the symmetric groups whose basis elements are called tabloids. Some of these modules are isomorphic to subspaces of the cohomology rings of subvarieties of flag varieties as modules of the symmetric groups. We give a combinatorial description for some weighted sums of their characters, i.e., we introduce combinatorial objects called ( ρ , l ) -tableaux and rewrite weighted sums of characters as the numbers of these combinatorial objects. We also consider the meaning of these combinatorial objects, i.e., we construct a correspondence between ( ρ , l ) -tableaux and tabloids whose images are eigenvectors of the action of an element of cycle type ρ in quotient modules.
Journal title :
European Journal of Combinatorics
Journal title :
European Journal of Combinatorics