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arXiv · 2507.14411

Very weak solutions of the heat equation with anisotropically singular time-dependent diffusivity

Zhirayr Avetisyan·Zahra Keyshams·Monire Mikaeili Nia·Michael Ruzhansky
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Abstract

We investigate the heat equation with a time-dependent, anisotropic, and potentially singular diffusivity tensor. Since weak (in the Sobolev sense) or distributional solutions may not exist in this setting, we employ the framework of very weak solutions to establish the existence and uniqueness of solutions to the heat equation with singular, anisotropic, time-dependent diffusivity.

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Zhirayr Avetisyan, Zahra Keyshams, Monire Mikaeili Nia, Michael Ruzhansky. 2025-07-18. Very weak solutions of the heat equation with anisotropically singular time-dependent diffusivity. https://arxiv.org/abs/2507.14411

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