Parabolic equations with continuous initial data

Details Parabolic equations with continuous initial data Parabolic equations with continuous initial data

2005-04-22

arxiv.org/abs/math/0504455v1

Mathematics

Analysis of PDEs

Author's thesis, submitted to the Australian National University, 2004. 117 pages

Scientific paper

The aim of this thesis is to derive new gradient estimates for parabolic equations. The gradient estimates found are independent of the regularity of the initial data. This allows us to prove the existence of solutions to problems that have non-smooth, continuous initial data. We include existence proofs for problems with both Neumann and Dirichlet boundary data. The class of equations studied is modelled on mean curvature flow for graphs. It includes anisotropic mean curvature flow, and other operators that have no uniform non-degeneracy bound. We arrive at similar estimates by three different paths: a 'double coordinate' approach, an approach examining the intersections of a solution and a given barrier, and a classical geometric approach.

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