aGraduate School of Mathematics, University of Tsukuba, Ibaraki 305-8571, Japan;bDepartment of Mathematics, Faculty of Education, Oita University, Dannoharu, Oita 870-1192, Japan
Abstract:
We will show that all subspaces of well-ordered spaces are orderable, and we will characterize the well-orderability of subspaces of well-ordered spaces.