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Costandard modules over Schur superalgebras in characteristic p

机译:特征p中Schur超级代数上的共标准模块

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In this paper we consider the problem of describing the costandard modules del(gimel) of a Schur superalgebra S(m vertical bar n, r) over a base field K of arbitrary characteristic. Precisely, if G=GL(m vertical bar n) is a general linear supergroup and Dist(G) its distribution superalgebra we compute the images of the Kostant Z-form under the epimorphism Dist(G)-> S(m vertical bar n, r). Then, we describe del(gimel) as the null-space of some set of superderivations and we obtain an isomorphism del(gimel) del(gimel(+)vertical bar 0) circle times del(0 vertical bar gimel(-)) assuming that gimel = (gimel(+)vertical bar gimel(-)) and gimel(m) = 0. If char( K) = p we give a Frobenius isomorphism del(0 vertical bar p mu) approximate to del(mu)(p) where r( mu is a costandard module of the ordinary Schur algebra S( n, r). Finally we provide a characteristic free linear basis for del(gimel vertical bar 0) which is parametrized by a set of superstandard tableaux.
机译:在本文中,我们考虑了在任意特性的基场K上描述Schur超代数S(m垂直棒n,r)的共标准模块del(gimel)的问题。精确地,如果G = GL(m竖线n)是一般的线性超群,而Dist(G)是它的分布超代数,我们将在子态Dist(G)-> S(m竖线n ,r)。然后,我们将del(gimel)描述为某些超导集的零空间,并假设del(gimel)del(gimel(+)垂直条0)圆乘以del(0垂直条gimel(-)),得出同构gimel =(gimel(+)垂直条gimel(-))和gimel(m)=0。如果char(K)= p,我们给出Frobenius同构del(0垂直条p mu)近似于del(mu)( p),其中r(mu是普通Schur代数S(n,r)的一个协标准模。

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