Ōshima, Hideaki A problem on coextensions. (English) Zbl 1462.55005 Math. J. Ibaraki Univ. 51, 27-38 (2019). MSC: 55P99 55P05 PDFBibTeX XMLCite \textit{H. Ōshima}, Math. J. Ibaraki Univ. 51, 27--38 (2019; Zbl 1462.55005) Full Text: DOI
Ōshima, Hideaki Multiplications on a localized Hopf space. (English) Zbl 0998.55004 Math. J. Ibaraki Univ. 33, 17-21 (2001). Reviewer: Corina Mohorianu (Iaşi) MSC: 55P45 55P60 55Q05 PDFBibTeX XMLCite \textit{H. Ōshima}, Math. J. Ibaraki Univ. 33, 17--21 (2001; Zbl 0998.55004) Full Text: DOI
Egawa, Tomoki; Ōshima, Hideaki Maps between small Hopf spaces. (English) Zbl 0976.55010 Math. J. Ibaraki Univ. 32, 33-61 (2000). Reviewer: Gregory Lupton (Cleveland) MSC: 55Q05 57T20 55P45 PDFBibTeX XMLCite \textit{T. Egawa} and \textit{H. Ōshima}, Math. J. Ibaraki Univ. 32, 33--61 (2000; Zbl 0976.55010) Full Text: DOI