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The universal enveloping algebra of and the Racah algebra

Abstract Let denote a field with The Racah algebra is the unital associative -algebra defined by generators and relations in the following way. The generators are A, B, C, D.… Click to show full abstract

Abstract Let denote a field with The Racah algebra is the unital associative -algebra defined by generators and relations in the following way. The generators are A, B, C, D. The relations assert that and each of the elements is central in Additionally the element is central in In this paper, we explore the relationship between the Racah algebra and the universal enveloping algebra Let a, b, c denote mutually commuting indeterminates. We show that there exists a unique -algebra homomorphism that sends where x, y, z are the equitable generators for We additionally give the images of and certain Casimir elements of under We also show that the map is an injection and thus provides an embedding of into We use the injection to show that contains no zero divisors.

Keywords: enveloping algebra; algebra; universal enveloping; algebra universal; racah algebra

Journal Title: Communications in Algebra
Year Published: 2019

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