Bernhard H. Haak

activity

20062026

most citedMathematical Analysis of the Motion of a Rigid Body in a Compressible Navier-Stokes-Fourier Fluid

24 citations · 60 across the 15 of their papers we have counts for

collaborators

Showing 2025Show all

2 papers · 1 filter

math.FA2025

A cheap way to closed operator sums

Bernhard H. Haak, Peer Christian Kunstmann

Let $A$ and $B$ be sectorial operators in a Banach space $X$ of angles $ω_{A}$ and $ω_{B}$ , respectively, where $ω_{A} + ω_{B} < π$ . We present a simple and common approach to results on close…

math.FA2025

A weak type $(p, a)$ criterion for operators, and applications

Bernhard H. Haak, El-Maati Ouhabaz

Let $(X, d, μ)$ be a space of homogeneous type and $Ω$ an open subset of $X$ . Given a bounded operator $T : L^{p} (Ω) \to L^{q} (Ω)$ for some $1 \leq p \leq q < \infty$ , we give a criterion…

A cheap way to closed operator sums

A weak type (p,a) criterion for operators, and applications

A weak type $(p, a)$ criterion for operators, and applications