2024-03-29T16:01:55Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/546932019-03-18T10:23:52Zhdl_2115_54689hdl_2115_45005hdl_2115_116On LF3 (3)Tsuzuku, Tosiro410北海道大学Departmental Bulletin Paperapplication/pdfhttp://hdl.handle.net/2115/54693https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/54693/1/JFSHIU_22_N3-4_104-107.pdf2189-3187Journal of the Faculty of Science Hokkaido University. Ser. 1 Mathematics223-41041071972engpublisher