The last twenty years have seen an active interaction between
mathematics and physics. This book is devoted to one of the new areas
which deals with mathematical structures related to conformal field
theory and its sqs-deformations. In the book, the author discusses the
interplay between Knizhnik-Zamolodchikov type equations, the Bethe
ansatz method, representation theory, and geometry of multi-dimensional
hypergeometric functions. This book aims to provide an introduction to
the area and expose different facets of the subject. It contains
constructions, discussions of notions, statements of main results, and
illustrative examples. The exposition is restricted to the simplest case
of the theory associated with the Lie algebra s\mathfrak{sl 2s. This
book is intended for researchers and graduate students in mathematics
and in mathematical physics, in particular to those interested in
applications of special functions.