## Differential and Integral Equations

### Uniqueness for multi-dimensional Stefan problems with nonlinear boundary conditions described by maximal monotone operators

Toyohiko Aiki

#### Abstract

In this paper we discuss weak solutions of the multi-dimensional two-phase Stefan problem with the boundary condition including the subdifferential operator of the convex function on $\mathbb R$ so that the boundary condition is nonlinear and contains a multi-valued operator, in general. Kenmochi and Pawlow already established the uniqueness and existence of a solution to our problem in the sense of the vanishing viscosity solution. The purpose of this paper is to prove the uniqueness theorem for a solution defined in the usual variational sense. Our proof is due to the standard method in which the dual problem of the original problem plays a very important role.

#### Article information

Source
Differential Integral Equations, Volume 15, Number 8 (2002), 973-1008.

Dates
First available in Project Euclid: 21 December 2012