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Classification of quantum tori with involution

Yoji Yoshii

math.RAarXiv:math/0110002

Abstract

Quantum tori with graded involution appear as coordinate algebras of extended affine Lie algebras of type A1, C and BC. We classify them in the category of algebras with involution. From this, we obtain precise information on the root systems of extended affine Lie algebras of type C.

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