Sya. Chang et J. Qing, THE ZETA-FUNCTIONAL DETERMINANTS ON MANIFOLDS WITH BOUNDARY .2. EXTREMAL METRICS AND COMPACTNESS OF ISOSPECTRAL SET, Journal of functional analysis, 147(2), 1997, pp. 363-399
This is a continuing research of our previous work (S.-Y. A. Chang and
J. Qing (1997), J. Funct. Anal. 147, 327-362). In this paper we show
W-2,W-2-compactness of isospectral set within a subclass of conformal
metrics, and discuss extremal properties of the zeta functional determ
inants, for certain elliptic boundary value problems on 4-manifolds wi
th smooth boundary. To do so we establish some sharp Sobolev trace ine
qualities. (C) 1997 Academic Press.