204 citations · 749 across the 51 of their papers we have counts for
53 papers
A dichotomy for extreme values of zeta and Dirichlet L-functions
Andriy Bondarenko, Pranendu Darbar, Markus Valås Hagen +2
We exhibit large values of the Dedekind zeta function of a cyclotomic field on the critical line. This implies a dichotomy whereby one either has improved lower bounds for the maxi…
Maximal norm Hankel operators
Ole Fredrik Brevig, Kristian Seip
A Hankel operator on the Hardy space of the unit circle with analytic symbol has minimal norm if and maximal norm if $\|\mathbf{…
Point evaluation in Paley--Wiener spaces
Ole Fredrik Brevig, Andrés Chirre, Joaquim Ortega-Cerdà +1
We study the norm of point evaluation at the origin in the Paley--Wiener space for , i. e., we search for the smallest positive constant , called $\mathsc…
Hilbert points in Hardy spaces
Ole Fredrik Brevig, Joaquim Ortega-Cerdà, Kristian Seip
A Hilbert point in , for and , is a nontrivial function in such that $\| φ\|_{H^p(\mathbb{T}^d)} \leq \|φ+…
Idempotent Fourier multipliers acting contractively on spaces
Ole Fredrik Brevig, Joaquim Ortega-Cerdà, Kristian Seip
We describe the idempotent Fourier multipliers that act contractively on spaces of the -dimensional torus for and . When …
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…