Free ℤ-module
Futa, Yuichi, Okazaki, Hiroyuki, Shidama, Yasunari
Continuity of Bounded Linear Operators on Normed Linear Spaces
Nakasho, Kazuhisa, Futa, Yuichi, Shidama, Yasunari
Compactness in Metric Spaces
Nakasho, Kazuhisa, Narita, Keiko, Shidama, Yasunari