On the Existence of Extremals for the Sobolev Trace Embedding Theorem with Critical Exponent
Departemento de Matemática, FCEyN UBA (1428) Buenos Aires, Argentina; jfbonder{at}dm.uba.ar
Departamento de Matemática, Universidad Católica de Chile Casilla 306, Correo 22, Santiago, Chile; jrossi{at}riemann.mat.puc.cl
Received 17 October 2003. Revision received 20 April 2004.
In this paper, the existence problem is studied for extremals of the Sobolev trace inequality W1,p(
)
Lp*(
), where
is a bounded smooth domain in RN, p*=p(N1)/(Np), is the critical Sobolev exponent, and 1 < p < N. 2000 Mathematics Subject Classification 35J65 (primary), 35B33 (secondary).
Supported by Fundacion Antorchas, CONICET, ANPCyT PICT Nos 05009 and 10608, and UBA X066.