Exponents of Subvarieties of Upper Triangular Matrices over Arbitrary Fields are Integral
Victor Petrogradsky
Abstract
Victor Petrogradsky
Abstract
Abstract. Let Uc be the variety of associative algebras generated by the algebra of all upper triangular matrices, the field being arbitrary. We prove that the upper exponent of any subvariety V ⊂ Uc coincides with the lower exponent and is an integer. 1. Codimension growth and exponents. Let K denote the ground field, we consider it to be arbitrary. Suppose that V is a variety of (associative) algebras, this is the class of all algebras that satisfy some fixed set of identical relations. Let F (V,X) be its free algebra generated by a countable set of gen-erators X = {xi | i ∈ N}. We denoteby Pn(V) ⊂ F (V,X) the subspace of all
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Abstract. Let Uc be the variety of associative algebras generated by the algebra of all upper triangular matrices, the field being arbitrary. We prove that the upper exponent of any subvariety V ⊂ Uc coincides with the lower exponent and is an integer. 1. Codimension growth and exponents. Let K denote the ground field, we consider it to be arbitrary. Suppose that V is a variety of (associative) algebras, this is the class of all algebras that satisfy some fixed set of identical relations. Let F (V,X) be its free algebra generated by a countable set of gen-erators X = {xi | i ∈ N}. We denoteby Pn(V) ⊂ F (V,X) the subspace of all
Key concepts: Subvariety, Mathematics, Triangular matrix, Exponent, Integer (computer science), Variety (cybernetics), Associative property, Field (mathematics)