-
作者:Hwang, JM; Mok, N
作者单位:Seoul National University (SNU); University of Hong Kong
-
作者:Soffer, A; Weinstein, MI
作者单位:Rutgers University System; Rutgers University New Brunswick; University of Michigan System; University of Michigan
摘要:We consider a class of nonlinear Klein-Gordon equations which are Hamiltonian and are perturbations of linear dispersive equations. The unperturbed dynamical system has a bound state, a spatially localized and time periodic solution. We show that, for generic nonlinear Hamiltonian perturbations, all small amplitude solutions decay to zero as time tends to infinity at an anomalously slow rate. In particular, spatially localized and time-periodic solutions of the linear problem are destroyed by ...
-
作者:Friedman, E; Skoruppa, NP
作者单位:Universidad de Chile; Universite de Bordeaux
-
作者:Cuypers, H; Steinbach, A
作者单位:Eindhoven University of Technology; Justus Liebig University Giessen
摘要:Most classical groups arising from (anti-) hermitian forms or (pseudo-) quadratic forms contain so-called isotropic transvections. The isotropic transvection subgroups of these classical groups, i.e., the subgroups generated by all isotropic transvections with a fixed axis, form a class Sigma of abelian subgroups which is a class of abstract transvection groups in the sense of Timmesfeld [24]. In this paper we give a common characterization of all these classical groups with isotropic transvec...
-
作者:Masur, HA; Minsky, YN
作者单位:University of Illinois System; University of Illinois Chicago; University of Illinois Chicago Hospital; State University of New York (SUNY) System; Stony Brook University