4 papers
On the Matricial Truncated Moment Problem. II
Conrad Mädler, Konrad Schmüdgen
We continue the study of truncated matrix-valued moment problems begun in arXiv:2310.00957. Let . Suppose that is a measurable space an…
On the Truncated Matricial Moment Problem. I
Conrad Mädler, Konrad Schmüdgen
This paper is about the general truncated matrix-valued moment problem. Let denote the complex Hermitian -matrices, . Suppose that $(\ma…
A necessary condition for certain functions to preserve positive semi-definiteness on partitioned matrices
Lutz Klotz, Conrad Mädler
If is a symmetric complex-valued function on the -fold Cartesian product of the set of non-negative reals and is a positive semi-definite matrix with eigenva…
On resolvent matrix, Dyukarev-Stieltjes parameters and orthogonal matrix polynomials via -Stieltjes transformed sequences
Abdon Eddy Choque-Rivero, Conrad Mädler
By using Schur transformed sequences and Dyukarev-Stieltjes parameters we obtain a new representation of the resolvent matrix corresponding to the truncated matricial Stieltjes mom…