Preprint

1. K. Uehara, A. Escrivà, T. Harada, D. Saito and C. M. Yoo, “Primordial black hole formation from a type II perturbation in the absence and presence of pressure,” [arXiv:2505.00366 [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].