Preprint

1. Hayami Iizuka and Tomohiro Harada, “Cosmological long-wavelength solutions in non-adiabatic multi-fluid systems,” [arXiv:2512.22531 [gr-qc]].
2. Masahiro Shimano, Tomohiro Harada and Naoki Tsukamoto, “A trapped surface in the higher-dimensional self-similar Vaidya spacetime,” arXiv:1108.3471 [gr-qc].