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Center of the Yangian double in type A

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Abstract

We prove that the R-matrix and Drinfeld presentations of the Yangian double in type A are isomorphic. The central elements of the completed Yangian double in type A at the critical level are constructed. The images of these elements under a Harish-Chandra-type homomorphism are calculated by applying a version of the Poincaré-Birkhoff-Witt theorem for the R-matrix presentation. These images coincide with the eigenvalues of the central elements in the Wakimoto modules.

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Acknowledgements

This work was supported by National Natural Science Foundation of China (Grant Nos. 12101261 and 12171303) and the Simons Foundation (Grant No. 523868).

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Correspondence to Naihuan Jing.

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Yang, F., Jing, N. Center of the Yangian double in type A. Sci. China Math. (2024). https://doi.org/10.1007/s11425-022-2142-9

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