On Some Interrelations Between J-Potapov Functions and J-Potapov Sequences

The Weyl matrix balls corresponding to the matricial truncated Hamburger moment problem

“…3) Closer analysis of the blocks of the generating matrix polynomial realizing the parametrization of the solution in order to achieve information on the concrete shape of parameters of the associated Weyl matrix ball (see [9,18]) This strategy could be also used to handle the corresponding interpolation problem for J-Potapov functions. This was done in collaboration with U. Raabe and K. Sieber (see [27][28][29][30]). Later the authors started their studies on matricial versions of truncated power moment problems on the real axis in the general matrix case.…”