204 citations · 749 across the 51 of their papers we have counts for
15 papers · 1 filter
A converse to the Schwarz lemma for planar harmonic maps
Ole Fredrik Brevig, Joaquim Ortega-Cerdà, Kristian Seip
A sharp version of a recent inequality of Kovalev and Yang on the ratio of the and norms for certain polynomials is obtained. The inequality is applied to establ…
Zeros of functions in Hilbert spaces of Dirichlet series
Kristian Seip
The Dirichlet--Hardy space $\Ht$ consists of those Dirichlet series for which . It is shown that the Blaschke condition in the half-plane…
A lower bound in Nehari's theorem on the polydisc
Joaquim Ortega-Cerdá, Kristian Seip
By theorems of Ferguson and Lacey (d=2) and Lacey and Terwilleger (d>2), Nehari's theorem is known to hold on the polydisc D^d for d>1, i.e., if H_ψis a bounded Hankel form on H^2(…
Interpolation and sampling in small Bergman spaces
Kristian Seip
Carleson measures and interpolating and sampling sequences for weighted Bergman spaces on the unit disk are described for weights that are radial and grow faster than the standard…
Discrete Hilbert transforms on sparse sequences
Yurii Belov, Tesfa Y. Mengestie, Kristian Seip
Weighted discrete Hilbert transforms from to a weighted space are studied, with a sequence of distinct points in…
Unitary discrete Hilbert transforms
Yurii Belov, Tesfa Y. Mengestie, Kristian Seip
Weighted discrete Hilbert transforms from to are considered, where and are disjoint…