کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4654659 1632831 2008 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tabloids and weighted sums of characters of certain modules of the symmetric groups
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات ریاضیات گسسته و ترکیبات
پیش نمایش صفحه اول مقاله
Tabloids and weighted sums of characters of certain modules of the symmetric groups
چکیده انگلیسی

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 ρρ in quotient modules.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Journal of Combinatorics - Volume 29, Issue 2, February 2008, Pages 480–492
نویسندگان
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