4 papers
From hyperbolic to complex Euler integrals
N. M. Belousov, G. A. Sarkissian, V. P. Spiridonov
Hyperbolic hypergeometric integrals are defined as Barnes-type integrals of products of hyperbolic gamma functions. Their reduction to ordinary hypergeometric functions is well kno…
Complex rational Ruijsenaars model. The two-particle case
N. M. Belousov, G. A. Sarkissian, V. P. Spiridonov
We consider a complex rational degeneration of the hyperbolic Ruijsenaars model emerging in the limit (or in CFT) and investigate in detail the…
Complex binomial theorem and pentagon identities
N. M. Belousov, G. A. Sarkissian, V. P. Spiridonov
We consider different pentagon identities realized by the hyperbolic hypergeometric functions and investigate their degenerations to the level of complex hypergeometric functions.…
Reflection operator and hypergeometry I: spin chain
P. Antonenko, N. Belousov, S. Derkachov +1
In this work we consider open spin chain, mainly the simplest case of one particle. Eigenfunctions of the model can be constructed using the so-called reflectio…