A generalisation of the Stieltjes relations for the Painlev\'e-IV
transcendents and their higher analogues determined by the dressing chains is
proposed. It is proven that if a rational function from a certain class
satisfies these relations it must be a solution of some higher Painlev\'e-IV
equation. The approach is based on the interpretation of the Stieltjes
relations as local trivial monodromy conditions for certain Schr\"odinger
equations in the complex domain. As a corollary a new class of the
Schr\"odinger operators with trivial monodromy is constructed in terms of the
Painlev\'e-IV transcendents.
@article{0012040,
author = {Veselov, A. P.},
title = {On Stieltjes relations, Painlev\'e-IV hierarchy and complex monodromy},
journal = {arXiv},
volume = {2000},
number = {0},
year = {2000},
language = {en},
url = {http://dml.mathdoc.fr/item/0012040}
}
Veselov, A. P. On Stieltjes relations, Painlev\'e-IV hierarchy and complex monodromy. arXiv, Tome 2000 (2000) no. 0, . http://gdmltest.u-ga.fr/item/0012040/