8 citations · 44 across the 30 of their papers we have counts for
4 papers · 1 filter
Rational Carathéodory Functions and Central Non-negative Hermitian Measures
Bernd Fritzsche, Bernd Kirstein, Conrad Mädler
We give an explicit representation of central measures corresponding to finite Toeplitz non-negative definite sequences of complex matrices. Such measures are intimatel…
Skew-selfadjoint Dirac systems: stability of the procedure of explicit solving the inverse problem
B. Fritzsche, B. Kirstein, I. Ya. Roitberg +1
Procedures to recover explicitly discrete and continuous skew-selfadjoint Dirac systems on semi-axis from rational Weyl matrix functions are considered. Their stability is shown. S…
On Matrix-Valued Stieltjes Functions with an Emphasis on Particular Subclasses
Bernd Fritzsche, Bernd Kirstein, Conrad Mädler
The paper deals with particular classes of matrix-valued functions which are holomorphic in , where is an arbitrary real number. The…
Skew-selfadjoint Dirac systems with rational rectangular Weyl functions: explicit solutions of direct and inverse problems and integrable wave equations
B. Fritzsche, M. A. Kaashoek, B. Kirstein +1
In this paper we study direct and inverse problems for discrete and continuous time skew-selfadjoint Dirac systems with rectangular (possibly non-square) pseudo-exponential potenti…