Cohomology of numerical monoids generated by three elements

Arne B. Sletsjøe

Preprint series, Matematisk institutt, Univ. of Oslo, No. 9-2000


We calculate the dimension of the tangent space of the deformation functor for numerical monoid algebras generated by three elements. Combining this with similar results of Buchweitz we obtain an implicit formula for the Frobenius number of the monoid.
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March. 2, 2000,