3 papers
gr-qc1997
Evolution of Cosmological Perturbations in the Long Wavelength Limit
H. Kodama, T. Hamazaki
The relation between the long wavelength limit of solutions to the cosmological perturbation equations and the perturbations of solutions to the exactly homogeneous background equa…
gr-qc1994
Does a domain wall emit gravitational waves? -- General-relativistic perturbative treatment
Hideo Kodama, Hideki Ishihara, Yoshihisa Fujiwara
The behavior of gravitational wave perturbations on a locally Minkowskian spacetime background containing a planar domain wall is investigated in the gauge-invariant general relati…
gr-qc1993
Comments on Closed Bianchi Models
Y. Fujiwara, H. Ishihara, H. Kodama
We show several kinematical properties that are intrinsic to the Bianchi models with compact spatial sections. Especially, with spacelike hypersurfaces being closed, (A) no anisotr…