Stratified modules over an extension algebra |
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Authors: | Erzsébet Lukács András Magyar |
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Institution: | 1.Department of Algebra,Budapest University of Technology and Economics,Budapest,Hungary |
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Abstract: | Let A be a standard Koszul standardly stratified algebra and X an A-module. The paper investigates conditions which imply that the module Ext* A (X) over the Yoneda extension algebra A* is filtered by standard modules. In particular, we prove that the Yoneda extension algebra of A is also standardly stratified. This is a generalization of similar results on quasi-hereditary and on graded standardly stratified algebras. |
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