Higher-Order Differentiation and Inverse Function Theorem in Real Normed Spaces
Nakasho, Kazuhisa, Shidama, Yasunari
Open Mapping Theorem
Sakurai, Hideki, Kunimune, Hisayoshi, Shidama, Yasunari
Gaussian Integers
Futa, Yuichi, Okazaki, Hiroyuki, Mizushima, Daichi, Shidama, Yasunari