  The main goal of the paper is to parametrize the Weyl matrix balls associated
with an arbitrary matricial truncated Hamburger moment problem. For the special
case of a non-degenerate matricial truncated Hamburger moment problem the
corresponding Weyl matrix balls were computed by I. V. Kovalishina in the
framework of V. P. Potapov's method of "Fundamental matrix inequalities".

Classical Analysis and ODEs;Complex Variables