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Effective detection of nonsplit module extensions
Letzter, ES
Letzter, ES
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Journal Article
Date
2005-06-01
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10.1016/j.jpaa.2004.10.013
Abstract
Let n be a positive integer, and let R be a finitely presented (but not necessarily finite dimensional) associative algebra over a computable field. We examine algorithmic tests for deciding (1) if every at most-n-dimensional representation of R is semisimple, and (2) if there exist nonsplit extensions of non-isomorphic irreducible R-modules whose dimensions sum to no greater than n. © Elsevier B.V. All rights reserved.
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Elsevier BV
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Journal of Pure and Applied Algebra
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