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arXiv 2004.03928math.RTmath.CO
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多项式归纳法与限制问题

Polynomial Induction and the Restriction Problem

Sridhar P. Narayanan, Digjoy Paul, Amritanshu Prasad, Shraddha Srivastava

摘要:

构造了多项式归纳函子,它是一般线性群的多项式表示范畴到其外尔群的表示范畴的限制函子的右伴随.这一建设导致一个代表理论证明Littlewood的plethystic公式的多重性的不可约表示的对称群在这样的限制。某些二分分拆函数的单峰性如下。

英文摘要:

We construct the polynomial induction functor, which is the right adjoint to the restriction functor from the category of polynomial representations of a general linear group to the category of representations of its Weyl group. This construction leads to a representation-theoretic proof of Littlewood's plethystic formula for the multiplicity of an irreducible representation of the symmetric group in such a restriction. The unimodality of certain bipartite partition functions follows.

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