摘要 :
Let A = circle plus i >= 0 A(i) be a piecewise-Koszul algebra with cohomology degree function delta(d)(p) such that d > p >= 2 and E(A) = circle plus(i >= 0) Ext(A)(i) (A(0), A(0)) its Yoneda algebra. We introduce a new grading on E(A):
摘要 :
Let A be a bi-Koszul algebra. We describe all possible A(infinity)-algebra structures on the Ext-algebra E(A) and prove that E(A) must be [m(2), m(3)]-finitely generated. We give an equivalent description of the condition for a co...
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Let A be a bi-Koszul algebra. We describe all possible A(infinity)-algebra structures on the Ext-algebra E(A) and prove that E(A) must be [m(2), m(3)]-finitely generated. We give an equivalent description of the condition for a connected graded algebra to be a bi-Koszul algebra in the language of A(infinity)-algebras. We discuss decomposition in the case that E(A) is endowed with minimal number of multiplications.
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