2024-03-28T10:33:48Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/692082022-11-17T02:08:08Zhdl_2115_45007hdl_2115_116Singularities of ruled surfaces in R 3Izumiya, S.Takeuchi, N.ruled surfacesdevelopable surfacessingularities410We study singularities of ruled surfaces in JR3. The main result asserts that only crossÂcaps appear as singularities for generic ruled surfaces.Department of Mathematics, Hokkaido UniversityDepartmental Bulletin Paperapplication/pdfhttp://hdl.handle.net/2115/69208info:doi/10.14943/83604https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/69208/1/pre458.pdfHokkaido University Preprint Series in Mathematics4581111999-05-01engpublisher