1 citations · 1 across the 4 of their papers we have counts for
4 papers
An operator theory approach to the evanescent part of a two-parametric weak-stationary stochastic process
Zbigniew Burdak, Marek Kosiek, Patryk Pagacz +1
A new approach to the evanescent part of a two-dimensional weak-stationary stochastic process with the past given by a half-plane is proceed. The classical result due to Helson and…
On singular pencils with commuting coefficients
Vadym Koval, Patryk Pagacz
We investigate the relation between the spectrum of matrix (or operator) polynomials and the Taylor spectrum of its coefficients. We prove that the polynomial of commuting matrices…
On bundle closures of matrix pencils and matrix polynomials
Fernando De Terán, Froilán M. Dopico, Vadym Koval +1
Bundles of matrix polynomials are sets of matrix polynomials with the same size and grade and the same eigenstructure up to the specific values of the eigenvalues. It is known that…
On the power-bounded operators of classes and
Patryk Pagacz
By a bounded backward sequence of the operator we mean a bounded sequence satisfying . In \cite{Pa} we have characterized contractions with strongly sta…