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math.AC2012★ 1 cited
On free resolutions of some semigroup rings
Valentina Barucci, Ralf Fröberg, Mesut Sahin
For some numerical semigroup rings of small embedding dimension, namely those of embedding dimension 3, and symmetric or pseudosymmetric of embedding dimension 4, presentations has…
math.AC2010
Extensions of Toric Varieties
Mesut Sahin
In this paper, we introduce the notion of "extension" of a toric variety and study its fundamental properties. This gives rise to infinitely many toric varieties with a special pro…