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N. Snashall

Publications and source records attributed to N. Snashall.

2 recordsLinked to original sources

Representation theory of the Drinfel'd doubles of a family of Hopf algebras

We investigate the Drinfel'd doubles $D(Λ_{n,d})$ of a certain family of Hopf algebras. We determine their simple modules and their indecomposable projective modules, and we obtain a presentation by quiver and relations of these Drinfel'd doubles, from which we deduce properties of their representations, including the Auslander-Reiten quivers of the $D(Λ_{n,d})$. We then determine decompositions of the tensor products of most of the representations described, and in particular give a complete description of the tensor product of two simple modules. This study also leads to explicit examples of Hopf bimodules over the original Hopf algebras.

math.RT↗

The Hochschild cohomology ring modulo nilpotence of a monomial algebra

For a finite dimensional monomial algebra $Λ$ over a field $K$ we show that the Hochschild cohomology ring of $Λ$ modulo the ideal generated by homogeneous nilpotent elements is a commutative finitely generated $K$-algebra of Krull dimension at most one. This was conjectured to be true for any finite dimensional algebra over a field by Snashall-Solberg.

math.KT↗