Wiener’s criterion for the unique solvability of the Dirichlet problem in arbitrary open sets with non-compact boundaries
✍ Scribed by Ugur G. Abdulla
- Publisher
- Elsevier Science
- Year
- 2007
- Tongue
- English
- Weight
- 238 KB
- Volume
- 67
- Category
- Article
- ISSN
- 0362-546X
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✦ Synopsis
This paper establishes a necessary and sufficient condition for the existence of a unique bounded solution to the classical Dirichlet problem in arbitrary open subset of R N (N ≥ 3) with a non-compact boundary. The criterion is the exact analogue of Wiener's test for the boundary regularity of harmonic functions and characterizes the "thinness" of a complementary set at infinity. The Kelvin transformation counterpart of the result reveals that the classical Wiener criterion for the boundary point is a necessary and sufficient condition for the unique solvability of the Dirichlet problem in a bounded open set within the class of harmonic functions having a "fundamental solution" kind of singularity at the fixed boundary point. Another important outcome is that the classical Wiener's test at the boundary point presents a necessary and sufficient condition for the "fundamental solution" kinds of singularities of the solution to the Dirichlet problem to be removable.