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20242026
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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.AP2025

On a class of (non)local superposition operators of arbitrary order

Serena Dipierro, Sven Jarohs, Enrico Valdinoci

In this paper we introduce a very general setting dealing with the superposition of operators of any positive order and provide a systematic study of them. We also provide examples…

math.AP2025

The Dirichlet Problem For the Logarithmic p-Laplacian

Bartłomiej Dyda, Sven Jarohs, Firoj Sk

We introduce and study the logarithmic -Laplacian , which emerges from the formal derivative of the fractional -Laplacian at . This operator is non…

math.AP2025

On overdetermind problems for a general class of nonlocal operators

Anup Biswas, Sven Jarohs

We study the overdetermined problem for a large family of non-local operators given by generators of subordinate Brownian motions. In particular, this family includes the fractiona…

math.AP2025

Overdetermined problems with fractional Laplacian

Mouhamed Moustapha Fall, Sven Jarohs

Let and . In the present work we characterize bounded open sets with boundary (\textit{not necessarily connected}) for which the following overdet…

math.AP2025

Continuity of solutions to equations with weakly singular nonlocal operators

Sven Jarohs, Moritz Kassmann, Tobias Weth

We prove boundedness and regularity estimates for weak solutions to a class of linear nonlocal equations involving integro-differential operators with almost no order of differenti…