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math.QA2001
An affine PI Hopf algebra not finite over a normal commutative Hopf subalgebra
Shlomo Gelaki, Edward S. Letzter
In formulating a generalized framework to study certain noncommutative algebras naturally arising in representation theory, K. A. Brown asked if every finitely generated Hopf algeb…
math.RA2001
Counting equivalence classes of irreducible representations
Edward S. Letzter
Let be a positive integer, and let be a (possibly infinite dimensional) finitely presented algebra over a computable field of characteristic zero. We describe an algorithm…
math.RA2001
Noetherianity of the Space of Irreducible Representations
Edward S. Letzter
Let R be an associative ring with identity. We study an elementary generalization of the classical Zariski topology, applied to the set of isomorphism classes of simple left R-modu…