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Iterative bounds for the stable solutions of convex non-linear boundary value problems*

Published online by Cambridge University Press:  14 February 2012

J. W. Mooney
Affiliation:
Paisley College of Technology
G. F. Roach
Affiliation:
University of Strathclyde

Synopsis

We consider a class of convex non-linear boundary value problems of the form

where L is a linear, uniformly elliptic, self-adjoint differential expression, f is a given non-linear function, B is a boundary differential expression of either Dirichlet or Neumann type and D is a bounded open domain with boundary ∂D. Particular problems of this class arise in the process of thermal combustion [8].

In this paper we show that stable solutions of this class can be bounded from below (above) by a monotonically increasing (decreasing) sequence of Newton (Picard) iterates. The possibility of using these schemes to construct unstable solutions is also considered.

Type
Research Article
Copyright
Copyright © Royal Society of Edinburgh 1977

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