Abstract
A necessary and sufficient condition is given on the boundary datum in order to the Dirichlet problem for an elliptic equation in a two-dimensional exterior Lipschitz domain has a unique solution with a finite Dirichlet integral which converges uniformly at infinity to an assigned constant value.
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Russo, R., Simader, C.G. On the exterior two-dimensional Dirichlet problem for elliptic equations. Ricerche mat. 58, 315–328 (2009). https://doi.org/10.1007/s11587-009-0066-9
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DOI: https://doi.org/10.1007/s11587-009-0066-9