Structure of entropy solutions to the eikonal equation |
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Authors: | Camillo De Lellis Felix Otto |
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Affiliation: | (1) Max–Planck Institute for Mathematics in the Sciences, Inselstr. 22–26, 04103 Leipzig, Germany, e-mail: delellis@mis.mpg.de, DE;(2) Institut für Angewandte Mathematik, University of Bonn, Wegelerstr. 10, 53115 Bonn, Germany, e-mail: otto@iam.uni-bonn.de, DE |
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Abstract: | In this paper, we establish rectifiability of the jump set of an S 1–valued conservation law in two space–dimensions. This conservation law is a reformulation of the eikonal equation and is motivated by the singular limit of a class of variational problems. The only assumption on the weak solutions is that the entropy productions are (signed) Radon measures, an assumption which is justified by the variational origin. The methods are a combination of Geometric Measure Theory and elementary geometric arguments used to classify blow–ups.?The merit of our approach is that we obtain the structure as if the solutions were in BV, without using the BV–control, which is not available in these variationally motivated problems. Received June 24, 2002 / final version received November 12, 2002?Published online February 7, 2003 |
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Keywords: | . entropy solutions – partial regularity – singular perturbation – conservation laws – rectifiability Mathematics Subject Classification (2000): 49N60, 35D10, 35L65, 35L67 |
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