The action of Sn on the cohomology of $$overline{M}_{0,n}(mathbb{R})$$
The action of Sn on the cohomology of $$overline{M}_{0,n}(mathbb{R})$$
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Sn 对 $$overline{M}_{0,n}(mathbb{R})$$ 上同调的作用
DOI:
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发表时间:
2009
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通讯作者:
E. Rains
中科院分区:
文献类型:
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作者:
E. Rains
Abstract.In recent work by Etingof, Henriques, Kamnitzer, and the author, a presentation and explicit basis was given for the rational cohomology of the real locus $$overline{M}_{0,n}({mathbb{R}})$$ of the moduli space of stable genus 0 curves with n marked points. We determine the graded character of the action of Sn on this space (induced by permutations of the marked points), both in the form of a plethystic formula for the cycle index, and as an explicit product formula for the value of the character on a given cycle type.