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arXiv 1604.07591math.RTmath.RA
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$q$ -Schur代数的Hochschild上同调

Hochschild cohomology of $q$-Schur algebras

Mayu Tsukamoto

摘要:

计算了$q$ -Schur代数的任意块的Hochschild上同调.我们关注这个Hochschild上同调环的偶数部分。为了计算$q$ -Schur代数的Hochschild上同调,我们证明了以下两个结果:第一,由于域上的所有$q$ -Schur代数都是拟遗传的,我们在拟遗传代数的Hochschild上同调之间构造了两个分次代数满射.其次,利用一个导出的等价关系,给出了Hochschild上同调的分次代数同构。

英文摘要:

We compute the Hochschild cohomology of any block of $q$-Schur algebras. We focus the even part of this Hochschild cohomology ring. To compute the Hochschild cohomology of $q$-Schur algebras, we prove the following two results: first, we construct two graded algebra surjections between the Hochschild cohomologies of quasi-hereditary algebras because all $q$-Schur algebras over a field are quasi-hereditary. Second, we give the graded algebra isomorphism of Hochschild cohomologies by using a certain derived equivalence.

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