q-Inverting pairs of linear transformations and the q-tetrahedron algebra
Abstract
As part of our study of the q-tetrahedron algebra q we introduce the notion of a q-inverting pair. Roughly speaking, this is a pair of invertible semisimple linear transformations on a finite-dimensional vector space, each of which acts on the eigenspaces of the other according to a certain rule. Our main result is a bijection between the following two sets: (i) the isomorphism classes of finite-dimensional irreducible q-modules of type 1; (ii) the isomorphism classes of q-inverting pairs.
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