Abstract
In this article, we construct certain commutative subalgebras of the big shuffle algebra of type \(A^{(1)}_{n-1}\). This can be considered as a generalization of the similar construction for the small shuffle algebra, obtained in Feigin et al. (J Math Phys 50(9):42, 2009). We present a Bethe algebra realization of these subalgebras. The latter identifies them with the Bethe subalgebras of \(U_q(\widehat{\mathfrak {gl}}_n)\).
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Notes
It is easy to see that the space of solutions of this system is 1-dimensional if q is not a root of unity.
Actually, one can consider the whole category of highest weight \(\ddot{U}^{'}_{q,d}(\mathfrak {sl}_n)\)-representations, see [12].
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Acknowledgments
We are grateful to A. Negut and J. Shiraishi for stimulating discussions. We are indebted to B. Enriquez for useful comments on the first version of the paper, which led to a better exposition of the material. A. T. is grateful to P. Etingof and H. Nakajima for their interest and support. A. T. thanks the Research Institute for Mathematical Sciences (Kyoto) and the Japan Society for the Promotion of Science for support during the main stage of the project. A. T. also gratefully acknowledges support from the Simons Center for Geometry and Physics, Stony Brook University, at which some of the research for this paper was performed. The work of A. T. was partially supported by the NSF Grant DMS-1502497. B. F. gratefully acknowledges the financial support of a subsidy granted to the HSE by the Government of the Russian Federation for the implementation of the Global Competitiveness Program.
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Feigin, B., Tsymbaliuk, A. Bethe subalgebras of \(U_q(\widehat{\mathfrak {gl}}_n)\) via shuffle algebras. Sel. Math. New Ser. 22, 979–1011 (2016). https://doi.org/10.1007/s00029-015-0212-z
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DOI: https://doi.org/10.1007/s00029-015-0212-z