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math.AP2026

Existence and non-existence results for a fractional Lane-Emden equation with nonlocal Neumann conditions

Eleonora Cinti, Matteo Talluri, Tobias Weth

We consider the fractional Lane-Emden equation with a nonlocal Neumann condition in a half-space. We establish the existence of non-constant solutions for the critical problem in a…

math.AP2026

-harmonic functions in the small order limit

Sven Jarohs, Abhrojyoti Sen, Tobias Weth

We study families of functions satisfying the equations , in a smooth bounded open set . The main purpose of this paper i…

math.AP2026

Normalized solutions of Nehari-Pankov type to mass-supercritical indefinite variational problems

Damien Galant, Tobias Weth

We consider abstract nonlinear equations of the form , where is a self-adjoint operator with compact resolvent on a Hilbert space , is…

math.AP2026

Fractional Dirichlet problems with an overdetermined nonlocal Neumann condition

Michele Gatti, Julian Scheuer, Tobias Weth

We investigate symmetry and quantitative approximate symmetry for an overdetermined problem related to the fractional torsion equation in a regular open, bounded set $Ω\subseteq \…

math.AP2026

Ground state solutions to generalized nonlinear wave equations with infinite-dimensional kernel

Rainer Mandel, Tobias Weth

The present paper is devoted to existence results for time-periodic solutions of generalized nonlinear wave equations in a closed Riemannian manifold M. Our main focus lies on the…