20 citations · 21 across the 22 of their papers we have counts for
5 papers · 1 filter
Universal multipliers for Sub-Hardy Hilbert spaces
Bartosz Malman, Daniel Seco
To every non-extreme point of the unit ball of $\hil^\infty$ of the unit disk there corresponds a Pythagorean mate, a bounded outer function satisfying the equation $|a|^2…
On the Crouzeix ratio for matrices
Bartosz Malman, Javad Mashreghi, Ryan O'Loughlin +1
The Crouzeix ratio of an complex matrix is the supremum of taken over all polynomials such that on the numerical range of . It i…
Distributing mass under a pointwise bound and an application to weighted polynomial approximation
Linus Bergqvist, Bartosz Malman
Inspired by applications in weighted polynomial approximation problems, we study an optimal mass distribution problem. Given a gauge function and a positive "roof" function …
Double-layer potentials, configuration constants and applications to numerical ranges
Bartosz Malman, Javad Mashreghi, Ryan O'Loughlin +1
Given a compact convex planar domain with non-empty interior, the classical Neumann's configuration constant is the norm of the Neumann-Poincaré operator $K…
Embeddings into de Branges-Rovnyak spaces
Bartosz Malman, Daniel Seco
We study conditions for containment of a given space of analytic functions on the unit disk in the de Branges-Rovnyak space . We deal with the non-…