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20242026
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math.FA2026

A solution to the inverse generator problem and related questions

Emiel Lorist, Martin Meyries, Mark Veraar

We give a negative solution to the inverse generator problem on Hilbert spaces. More precisely, we construct a bounded operator with dense range on a Hilbert space that gen…

math.FA2026

Operator-valued Fourier multipliers of bounded s-variation

Chenxi Deng, Emiel Lorist, Mark Veraar

In this paper, we establish an operator-valued Fourier multiplier theorem in weighted Lebesgue spaces, Besov and Triebel--Lizorkin spaces, assuming the multiplier has

math.FA2025

-calculus for the Dirichlet Laplacian on conical domains

Petru A. Cioica-Licht, Emiel Lorist, P. Tobias Werner

We establish boundedness of the -calculus for the Dirichlet Laplacian on conical domains in and corresponding wedges on -spaces with mixed weights. Th…

math.FA2025

Functional calculus on weighted Sobolev spaces for the Laplacian on the half-space

Nick Lindemulder, Emiel Lorist, Floris Roodenburg +1

In this paper, we consider the Laplace operator on the half-space with Dirichlet and Neumann boundary conditions. We prove that this operator admits a bounded -calculus o…

math.FA2024

Strongly Kreiss Bounded Operators in UMD Banach Spaces

Chenxi Deng, Emiel Lorist, Mark Veraar

In this paper we give growth estimates for for in the case is a strongly Kreiss bounded operator on a UMD Banach space . In several special cases we…

math.FA2024

A discrete framework for the interpolation of Banach spaces

Nick Lindemulder, Emiel Lorist

We develop a discrete framework for the interpolation of Banach spaces, which contains the well-known real and complex interpolation methods, but also more recent methods like the…