Interior capacities of condensers with infinitely many plates in a locally compact space

Details Interior capacities of condensers with infinitely many plates in a locally compact space Interior capacities of condensers with infinitely many plates in a locally compact space

2009-06-24

arxiv.org/abs/0906.4522v1

Mathematics

Classical Analysis and ODEs

42 pages

Scientific paper

The study deals with the theory of interior capacities of condensers in a locally compact space, a condenser being treated here as a countable, locally finite collection of arbitrary sets with the sign +1 or -1 prescribed such that the closures of opposite-signed sets are mutually disjoint. We are motivated by the known fact that, in the noncompact case, the main minimum-problem of the theory is in general unsolvable, and this occurs even under very natural assumptions (e.g., for the Newtonian, Green, or Riesz kernels in an Euclidean space and closed condensers of finitely many plates). Therefore it was particularly interesting to find statements of variational problems dual to the main minimum-problem (and hence providing some new equivalent definitions of the capacity), but now always solvable (e.g., even for nonclosed, unbounded condensers of infinitely many plates). For all positive definite kernels satisfying B. Fuglede's condition of consistency between the strong and weak-star topologies, problems with the desired properties are posed and solved. Their solutions provide a natural generalization of the well-known notion of interior capacitary distributions associated with a set. We give a description of those solutions, establish statements on their uniqueness and continuity, and point out their characteristic properties.

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