16 citations · 96 across the 45 of their papers we have counts for
55 papers
A Schwarz-Jack lemma, circularly symmetric domains and numerical ranges
Javad Mashreghi, Annika Moucha, Ryan O'Loughlin +2
We prove a Schwarz-Jack lemma for holomorphic functions on the unit disk with the property that their maximum modulus on each circle about the origin is attained at a point on the…
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…
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…
On the Divergence of Taylor Series in de Branges-Rovnyak Spaces
Pierre-Olivier Parisé, Thomas Ransford
It is known that there exist functions in certain de Branges--Rovnyak spaces whose Taylor series diverge in norm, even though polynomials are dense in the space. This is often prov…
Asymptotically equicontinuous sequences of operators and a Banach-Steinhaus type theorem
Javad Mashreghi, Thomas Ransford
We introduce the notion of an asymptotically equicontinuous sequence of linear operators, and use it to prove the following result. If are topological vector spaces, if $T_n,…
Summability and duality
Soumitra Ghara, Javad Mashreghi, Thomas Ransford
We formalize the observation that the same summability methods converge in a Banach space and its dual . At the same time we determine conditions under which these methods…