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Hochschild cohomology and orbifold Jacobian algebras associated to invertible polynomials
Journal of Noncommutative Geometry ( IF 0.7 ) Pub Date : 2020-08-12 , DOI: 10.4171/jncg/370
Alexey Basalaev 1 , Atsushi Takahashi 2
Affiliation  

Let $f$ be an invertible polynomial and $G$ a group of diagonal symmetries of $f$. This note shows that the orbifold Jacobian algebra Jac$(f,G)$ of $(f,G)$ defined by [2] is isomorphic as a $\mathbb Z/2\mathbb ZZ$-graded algebra to the Hochschild cohomology $\mathsf{HH}^*(\mathrm {MF}_G(f))$ of the dg-category $\mathrm {MF}_G(f)$ of $G$-equivariant matrix factorizations of $f$ by calculating the product formula of $\mathsf{HH}^*(\mathrm {MF}_G(f))$ given by Shklyarov [10]. We also discuss the relation of our previous results to the categorical equivalence.

中文翻译:

与可逆多项式相关的Hochschild同调和单Jacobian代数

假设$ f $是可逆多项式,而$ G $是一组对角对称$ f $。该注释表明,[2]定义的$(f,G)$的雅可比雅可比代数Jac $(f,G)$同构为Hochschild同调的$ \ mathbb Z / 2 \ mathbb ZZ $阶代数。 dg类的$ \ mathsf {HH} ^ *(\ mathrm {MF} _G(f))$ $ G $的$ \ mathrm {MF} _G(f)$-等价矩阵分解为$ f $ Shklyarov [10]给出的$ \ mathsf {HH} ^ *(\ mathrm {MF} _G(f))$的乘积公式。我们还讨论了先前结果与绝对等价关系。
更新日期:2020-08-12
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