Abstract
We present a shuffle realization of the GKLO-type homomorphisms for shifted quantum affine, toroidal, and quiver algebras in the spirit of Feigin and Odesskii (Funktsional. Anal. Prilozhen. 31(3):57–70, 1997), thus generalizing its rational version of Frassek and Tsymbaliuk (Commun. Math. Phys. 392:545–619, 2022) and the type A construction of Finkelberg and Tsymbaliuk (Arnold Math. J. 5(2–3):197–283, 2019). As an application, this allows us to construct large families of commuting and q-commuting difference operators, in particular, providing a convenient approach to the Q-systems where it proves a conjecture of Di Francesco and Kedem (Commun. Math. Phys. 369(3):867–928, 2019).
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Acknowledgements
I am indebted to Boris Feigin, Michael Finkelberg, and especially Andrei Neguţ for many enlightening discussions about shuffle algebras and related structures; to Philippe Di Francesco and Rinat Kedem for a correspondence about their work [4,5,6] on quantum Q-systems; to the anonymous referees for useful suggestions that improved the exposition. I am gratefully acknowledging the support from NSF Grants DMS-1821185 and DMS-2037602.
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Tsymbaliuk, A. Difference operators via GKLO-type homomorphisms: shuffle approach and application to quantum Q-systems. Lett Math Phys 113, 22 (2023). https://doi.org/10.1007/s11005-023-01639-1
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DOI: https://doi.org/10.1007/s11005-023-01639-1
Keywords
- Shuffle algebras
- GKLO-type homomorphisms
- Quantum Q-systems
- Generalized Macdonald operators
- Quantum loop algebras