ON THE INCLUSION H-2(U-N) SUBSET-OF H-2N(B-N) AND THE ISOPERIMETRIC INEQUALITY

Citation
M. Pavlovic et Mr. Dostanic, ON THE INCLUSION H-2(U-N) SUBSET-OF H-2N(B-N) AND THE ISOPERIMETRIC INEQUALITY, Journal of mathematical analysis and applications (Print), 226(1), 1998, pp. 143-149
Citations number
6
Categorie Soggetti
Mathematics,Mathematics,Mathematics,Mathematics
ISSN journal
0022247X
Volume
226
Issue
1
Year of publication
1998
Pages
143 - 149
Database
ISI
SICI code
0022-247X(1998)226:1<143:OTIHSH>2.0.ZU;2-9
Abstract
Let U-n and B-n be the unit polydisc and the unit all in C-n, respecti vely. We prove that if f is in the Hardy space H-2(U-n), then f is in H-2n(B-n) and that the norm of the inclusion is equal to one. If f dep ends on one variable only, then the result reduces to an inequality of isoperimetric type due to Carleman (n = 2) and Burbea (n > 2). (C) 19 98 Academic Press.