“…In case F is compact, our results are implicit in the work of Brelot [2] and Deny [3], at least when R is a planar domain. Hence the thrust of our work is that we can now approximate on unbounded sets.…”
Abstract. This paper deals with the qualitative theory of uniform approximation by harmonic functions. The theorems of Brelot and Deny on Runge-and Walshtype approximation on compact sets are extended to unbounded closed sets.
“…In case F is compact, our results are implicit in the work of Brelot [2] and Deny [3], at least when R is a planar domain. Hence the thrust of our work is that we can now approximate on unbounded sets.…”
Abstract. This paper deals with the qualitative theory of uniform approximation by harmonic functions. The theorems of Brelot and Deny on Runge-and Walshtype approximation on compact sets are extended to unbounded closed sets.
“…This holds for all such components V, so Theorem B is due to Keldys [14] and Deny [7] under the additional assumption that E is compact. For the case of general closed sets £', see either [15,Theorem 3.10] or [4, Section 8].…”
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