An operator approach to the rational solutions of the classical Yang-Baxter equation

Details An operator approach to the rational solutions of the classical Yang-Baxter equation An operator approach to the rational solutions of the classical Yang-Baxter equation

2010-02-17

arxiv.org/abs/1002.3250v1

Reports on Mathematical Physics 65 (2010) 165-187

Physics

Mathematical Physics

23pages

Scientific paper

Motivated by the study of the operator forms of the constant classical Yang-Baxter equation given by Semonov-Tian-Shansky, Kupershmidt and the others, we try to construct the rational solutions of the classical Yang-Baxter equation with parameters by certain linear operators. The fact that the rational solutions of the CYBE for the simple complex Lie algebras can be interpreted in term of certain linear operators motivates us to give the notion of $\mathcal O$-operators such that these linear operators are the $\mathcal O$-operators associated to the adjoint representations. Such a study can be generalized to the Lie algebras with nondegenerate symmetric invariant bilinear forms. Furthermore we give a construction of a rational solution of the CYBE from an $\mathcal O$-operator associated to the coadjoint representation and an arbitrary representation with a trivial product in the representation space respectively.

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