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arXiv math/0606144math.KTmath.AT
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Ext-代数上的A-无穷结构

A-infinity structure on Ext-algebras

D. -M. Lu, J. H. Palmieri, Q. -S. Wu, J. J. Zhang

摘要:

设A是连通的分次代数,E表示它的Ext-代数.在E上存在一个自然的A-无穷代数结构,并证明了这个结构主要由A的关系决定。特别地,限制于Ext ^1的张量幂幂的A-无穷乘积m_n的系数给出了A的关系式的系数。我们还将m_n与Massey产品联系起来。

英文摘要:

Let A be a connected graded algebra and let E denote its Ext-algebra. There is a natural A-infinity algebra structure on E, and we prove that this structure is mainly determined by the relations of A. In particular, the coefficients of the A-infinity products m_n restricted to the tensor powers of Ext^1 give the coefficients of the relations of A. We also relate the m_n's to Massey products.

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