Integrability of the derivative of solutions to a singular one-dimensional parabolic problem

Atsushi Nakayasu, Piotr Rybka

Abstract


We study integrability of the derivative of a solution to a singular one-dimensional parabolic equation with initial data in $W^{1,1}$. In order to avoid additional difficulties we consider only the periodic boundary conditions. The problem we study is a gradient flow of a convex, linear growth variational functional. We also prove a similar result for the elliptic companion problem, i.e.\ the time semidiscretization.

Keywords


Strongly singular parabolic and elliptic equations

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