Robuta

https://eprints.lib.hokudai.ac.jp/repo/huscap/all/67392/ Timelike Sabban curves in de Sitter space | 北海道大学学術成果コレクション : HUSCAP de sitter space timelike curves https://arkadiusz-jadczyk.eu/blog/2017/05/sl2r-anti-de-sitter-space-cont/ SL2R as anti de Sitter space cont. - Open System - Ark's blog anti de sitter open system space cont ark