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- W4297750168 abstract "In this paper we introduce the notion of an idempotent system. This linear algebraic object is motivated by the structure of an association scheme. We focus on a family of idempotent systems, said to be symmetric. A symmetric idempotent system is an abstraction of the primary module for the subconstituent algebra of a symmetric association scheme. We describe the symmetric idempotent systems in detail. We also consider a class of symmetric idempotent systems, said to be $P$-polynomial and $Q$-polynomial. In the topic of orthogonal polynomials there is an object called a Leonard system. We show that a Leonard system is essentially the same thing as a symmetric idempotent system that is $P$-polynomial and $Q$-polynomial." @default.
- W4297750168 created "2022-09-30" @default.
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- W4297750168 date "2020-04-30" @default.
- W4297750168 modified "2023-09-30" @default.
- W4297750168 title "Idempotent systems" @default.
- W4297750168 doi "https://doi.org/10.48550/arxiv.2004.14997" @default.
- W4297750168 hasPublicationYear "2020" @default.
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