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A symmetry result for the torsion equation in an unbounded domain in 2D
Journal article   Open access   Peer reviewed

A symmetry result for the torsion equation in an unbounded domain in 2D

Lihe Wang and Lizhou Wang
Journal of mathematical analysis and applications, Vol.407(2), pp.550-556
11/15/2013
DOI: 10.1016/j.jmaa.2013.05.067
url
https://doi.org/10.1016/j.jmaa.2013.05.067View
Published (Version of record) Open Access

Abstract

We investigate an overdetermined problem for the torsion equation Δu=−1 with two kinds of free boundary conditions in an unbounded domain and present a symmetry result in the case of 2D. The proof is based on the maximum principle. In the proof, we use the sliding method and some convex arguments.
Maximum principle Unbounded domain Overdetermined problem Symmetry

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