On the Harnack inequality for time-fractional and more general non-local in time subdiffusion equations
Analysis of PDEs
2025-10-22 v1
Abstract
In this paper we establish the Harnack inequality for globally positive local solutions to a general class of nonlocal in time subdiffusion equations in one space dimension, which includes time-fractional diffusion equations with time order less than one. It is already known that for these equations the classical Harnack inequality does not hold if the space dimension is greater than or equal to two. Here, we complete the analysis, by providing a positive result in one space dimension.
Keywords
Cite
@article{arxiv.2510.17992,
title = {On the Harnack inequality for time-fractional and more general non-local in time subdiffusion equations},
author = {Katarzyna Ryszewska and Rico Zacher},
journal= {arXiv preprint arXiv:2510.17992},
year = {2025}
}
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25 pages