The algebra generated by the down and up operators on a differential or Ž . uniform partially ordered set poset encodes essential enumerative and structural properties of the poset. Motivated by the algebras generated by the down and up operators on posets, we introduce here a family of infinite-dim
Centers of Down–Up Algebras
✍ Scribed by Kaiming Zhao
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 144 KB
- Volume
- 214
- Category
- Article
- ISSN
- 0021-8693
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✦ Synopsis
Down᎐up algebras which originated in the study of differential posets were recently defined and studied by Benkart and Roby. Benkart posed an open problem in her paper: to determine the centers of all down᎐up algebras. Here in this paper we completely solve this problem. As an application we also get the centers of homogenizations of down᎐up algebras.
📜 SIMILAR VOLUMES
A class of algebras called down-up algebras was introduced by G. Benkart and T. Roby (1998, J. Algebra 209, 305-344). We classify the finite dimensional simple modules over Noetherian down-up algebras and show that in some cases every finite dimensional module is semisimple. We also study the questi
lie in a certain class of iterated skew polynomial rings, called ambiskew polynomial rings, in two indeterminates x and y over a commutative ring B. In such rings, commutation of the indeterminates with elements of B involve the same endomorphism σ of B, but from different sides, that is, yb = σ b y