MULTIPLY UNIVERSAL HOLOMORPHIC-FUNCTIONS

Authors
Citation
W. Luh, MULTIPLY UNIVERSAL HOLOMORPHIC-FUNCTIONS, Journal of approximation theory, 89(2), 1997, pp. 135-155
Citations number
31
Categorie Soggetti
Mathematics, Pure",Mathematics
ISSN journal
00219045
Volume
89
Issue
2
Year of publication
1997
Pages
135 - 155
Database
ISI
SICI code
0021-9045(1997)89:2<135:MUH>2.0.ZU;2-U
Abstract
Let O subset of C O not equal C, be an open set with simply connected components. In Theorem 1 we prove the existence of a holomorphic funct ion phi on O, which has together with all its derivatives and all its antiderivatives six universal properties at the same time (based on th e behaviour of sequences of derivatives or antiderivatives, overconver gence-phenomena, or properties of translates). In Theorem 2 we show th at the family of all functions with these universal properties is a de nse subset of the metric space H(O) of all holomorphic functions on O, if H(O) is endowed with the usual compact-open topology. (C) 1997 Aca demic Press.