M. Nakamura et T. Ozawa, NONLINEAR SCHRODINGER-EQUATIONS IN THE SOBOLEV SPACE OF CRITICAL ORDER, Journal of functional analysis, 155(2), 1998, pp. 364-380
The Cauchy problem for the nonlinear Schrodinger equations is consider
ed in the Sobolev space H-n/2(R-n) of critical order n/2, where the em
bedding into L-infinity(R-n) breaks down and any power behavior of int
eraction works as a subcritical nonlinearity. Under the interaction of
exponential type the existence and uniqueness is proved far global H-
n/2-solutions with small Cauchy data. (C) 1998 Academic Press.