Preprint

1. T. Harada, H. Iizuka, Y. Koga and C. M. Yoo, “Geometrical origin for the compaction function for primordial black hole formation,” [arXiv:2409.05544 [gr-qc]].
2. A. Katsumata, T. Harada, K. Ogasawara and H. Iizuka, “New series expansion method for the periapsis shift,” [arXiv:2408.12977 [gr-qc]].
3. Masahiro Shimano, Tomohiro Harada and Naoki Tsukamoto, “A trapped surface in the higher-dimensional self-similar Vaidya spacetime,” arXiv:1108.3471 [gr-qc].