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T‐invariant algebras on Riemann surfaces
Author(s) -
Boivin André
Publication year - 1987
Publication title -
mathematika
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.955
H-Index - 29
eISSN - 2041-7942
pISSN - 0025-5793
DOI - 10.1112/s0025579300013413
Subject(s) - mathematics , meromorphic function , sketch , riemann surface , cauchy distribution , invariant (physics) , riemann hypothesis , riemann's differential equation , geometric function theory , riemann xi function , planar , complex plane , pure mathematics , cauchy–riemann equations , mathematical analysis , mathematical physics , computer graphics (images) , algorithm , computer science
The main purpose of this article is to outline for non‐compact Riemann surfaces the development of a theory of T ‐invariant algebras similar to that developed by T. W. Gamelin [7] in the case of the plane. The main idea is to introduce, using the global local uniformizer of R. C. Gunning and R. Narashimhan, a Cauchy transform operator for the Riemann surface which operates on measures and solves an inhomogeneous∂ ¯ ‐equation. This, in turn, can be used, analogously to the Cauchy transform on the plane, to develop meromorphic (rational) approximation theory. We sketch the path of the development but omit most of the details when they are very much similar to the planar case. Our presentation follows closely that of [7]. The original motivation for this study was to obtain more information on Gleason parts useful in the study of Carleman (tangential) approximation theory (see [5]).