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We introduce Baxter Q-operators for the quantum Ruijsenaars hyperbolic system. We prove that they represent a commuting family of integral operators and also commute with Macdonald difference operators, which are gauge equivalent to the…

Mathematical Physics · Physics 2023-08-30 N. Belousov , S. Derkachov , S. Kharchev , S. Khoroshkin

In this paper we show how the Baxter Q-operator and the product formula for eigenfunctions of two-particle hyperbolic Ruijsenaars system can be derived from the genus one Moore-Seiberg duality identity in two-dimensional Liouville conformal…

High Energy Physics - Theory · Physics 2026-03-26 Elena Apresyan , Gor Sarkissian

In the previous paper we showed that the wave functions of the quantum Ruijsenaars hyperbolic system diagonalize Baxter Q-operators. Using this property and duality relation we prove orthogonality and completeness relations for the wave…

Mathematical Physics · Physics 2023-08-01 N. Belousov , S. Derkachov , S. Kharchev , S. Khoroshkin

In these notes we review the technique of Baxter Q-operators in the Ruijsenaars-Sutherland hyperbolic systems in the cases of one and two particles. Using these operators we show in particular that eigenfunctions of these systems admit two…

Mathematical Physics · Physics 2023-09-13 N. Belousov , S. Derkachov , S. Kharchev , S. Khoroshkin

We introduce several new identities combining basic hypergeometric sums and integrals. Such identities appear in the context of superconformal index computations for three-dimensional supersymmetric dual theories. We give both analytic…

High Energy Physics - Theory · Physics 2016-11-08 Ilmar Gahramanov , Hjalmar Rosengren

In this article, we provide an application of hypergeometric evaluation identities, including a strange valuation of Gosper, to prove several supercongruences related to special valuations of truncated hypergeometric series. In particular,…

Number Theory · Mathematics 2010-12-17 Ling Long

We show how certain hypergeometric functions play an important role in finding fundamental solutions for a generalized Tricomi operator.

Analysis of PDEs · Mathematics 2007-05-23 J. Barros-Neto , Fernando Cardoso

We introduce and study a new family of commuting Baxter operators in the Ruijsenaars hyperbolic system, different from that considered by us earlier. Using a degeneration of Rains integral identity we verify the commutativity between the…

Mathematical Physics · Physics 2024-03-25 N. Belousov , S. Derkachov , S. Kharchev , S. Khoroshkin

We describe a bilinear identity satisfied by certain multidimensional q-hypergeometric integrals. The identity can be considered as a deformation of the Riemann bilinear relation for the twisted de Rham (co)homologies. The identity also…

q-alg · Mathematics 2008-02-03 Vitaly Tarasov

There are many identities for the hypergeometric series presented in the article "Special values of the hypergeometric series" by Ebisu. In this note, we obtain a new hypergeometric identity, which includes some of these identities as…

Classical Analysis and ODEs · Mathematics 2017-03-21 Akihito Ebisu

We give explicit formulae and study the combinatorics of an identity holding in all Rota-Baxter algebras. We describe the specialization of this identity for a couple of examples of Rota-Baxter algebras.

Combinatorics · Mathematics 2016-01-07 Rafael Diaz , Marcelo Paez

It is well-known that differentiation of hypergeometric function multiplied by a certain power function yields another hypergeometric function with a different set of parameters. Such differentiation identities for hypergeometric functions…

Classical Analysis and ODEs · Mathematics 2022-12-13 Hayato Motohashi

We prove hypergeometric type identities for a function defined in terms of quotients of the $p$-adic gamma function. We use these identities to prove a supercongruence conjecture of Rodriguez-Villegas between a truncated $_4F_3$…

Number Theory · Mathematics 2014-07-25 Jenny G. Fuselier , Dermot McCarthy

We prove equivalence of two integral representations for the wave functions of hyperbolic Calogero-Sutherland system. For this we study two families of Baxter operators related to hyperbolic Calogero-Sutherland and rational Ruijsenaars…

Mathematical Physics · Physics 2026-01-21 N. Belousov , L. Cherepanov , S. Derkachov , S. Khoroshkin

We establish some new bilateral double-sum Rogers-Ramanujan identities involving parameters. As applications, these identities yield several new multi-sum Rogers-Ramanujan type identities. Our proofs utilize the theory of basic…

Combinatorics · Mathematics 2026-04-21 Dandan Chen , Tianjian Xu

We consider representations of quadratic $R$-matrix algebras by means of certain first order ordinary differential operators. These operators turn out to act as parameter shifting operators on the Gauss hypergeometric function and its limit…

High Energy Physics - Theory · Physics 2016-09-06 Tom H. Koornwinder , Vadim B. Kuznetsov

The aim of this research paper is to demonstrate how one can obtain eleven new and interesting hypergeometric identities (in the form of a single result) from the old ones by mainly applying the well known beta integral method which was…

Complex Variables · Mathematics 2013-08-15 Adel K. Ibrahim , Medhat A. Rakha , Arjun K. Rathie

Identities between Whittaker and modified Bessel functions are derived for particular complex orders. Certain polynomials appear in such identities, which satisfy a fourth order differential equation (not of hypergeometric type), and they…

Mathematical Physics · Physics 2007-05-23 James Lucietti

We consider representations of quadratic $R$-matrix algebras by means of certain first order ordinary differential operators. These operators turn out to act as parameter shifting operators on the Gauss hypergeometric function and its limit…

Quantum Algebra · Mathematics 2016-09-06 Tom H. Koornwinder , Vadim B. Kuznetsov

We show that a binomial identity arising in the context of the study of series expansions of $1/\pi$ can be seen as an incarnation of Whipples second theorem for hypergeometric series.

Number Theory · Mathematics 2019-07-23 Benjamin Hackl , Helmut Prodinger
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