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math.AC2019
The Hochschild cohomology ring of the numerical semigroup algebras of embedding dimension two
Nghia T. H. Tran, Emil Sköldberg
Let and be two coprime positive integers and an arbitrary field. We determine the ring structure of the Hochschild cohomology of the numerical semigroup algebras $k[s^{…
math.AC2016★ 2 cited
The minimal resolution of a cointerval edge ideal is multiplicative
Emil Sköldberg
We show that the minimal resolution of the quotient of the polynomial algebra over a field by a cointerval edge ideal can be given the structure of a DG-algebra.
math.AC2011★ 7 cited
Resolutions of modules with initially linear syzygies
Emil Sköldberg
We introduce the class of modules with initially linear syzygies, which includes ideals with linear quotients, and study their minimal resolutions. Using a contracting homotopy for…