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LAX OPERATOR ALGEBRAS AND GRADINGS ON SEMI-SIMPLE LIE ALGEBRAS

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Abstract

A Lax operator algebra is constructed for an arbitrary semi-simple Lie algebra over ℂ equipped with a ℤ-grading, and arbitrary compact Riemann surface with marked points. In this set-up, a treatment of almost graded structures, and classification of the central extensions of Lax operator algebras are given. A relation to the earlier approach based on the Tyurin parameters is established.

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SHEINMAN, O.K. LAX OPERATOR ALGEBRAS AND GRADINGS ON SEMI-SIMPLE LIE ALGEBRAS. Transformation Groups 21, 181–196 (2016). https://doi.org/10.1007/s00031-015-9340-y

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