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Based algebras and standard bases
for quasi-hereditary algebras

Authors: Jie Du and Hebing Rui
Journal: Trans. Amer. Math. Soc. 350 (1998), 3207-3235
MSC (1991): Primary 16G99, 17B10; Secondary 20C20, 20C30
MathSciNet review: 1603902
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Abstract: Quasi-hereditary algebras can be viewed as a Lie theory approach to the theory of finite dimensional algebras. Motivated by the existence of certain nice bases for representations of semisimple Lie algebras and algebraic groups, we will construct in this paper nice bases for (split) quasi-hereditary algebras and characterize them using these bases. We first introduce the notion of a standardly based algebra, which is a generalized version of a cellular algebra introduced by Graham and Lehrer, and discuss their representation theory. The main result is that an algebra over a commutative local noetherian ring with finite rank is split quasi-hereditary if and only if it is standardly full-based. As an application, we will give an elementary proof of the fact that split symmetric algebras are not quasi-hereditary unless they are semisimple. Finally, some relations between standardly based algebras and cellular algebras are also discussed.

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Additional Information

Jie Du
Affiliation: Schools of Mathematics, University of New South Wales, Sydney, 2052, Australia

Hebing Rui
Affiliation: Department of Mathematics, University of Shanghai for Science & Technology, Shanghai, 200093, People’s Republic of China

Received by editor(s): September 13, 1996
Additional Notes: Both authors gratefully acknowledge support received from Australian Research Council under Large ARC Grant A69530243. The second author is partially supported by the National Natural Science Foundation, grant no. 19501016, in P.R. China. He wishes to thank the University of New South Wales for its hospitality during his visit.
Article copyright: © Copyright 1998 American Mathematical Society

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