Formalization of the Data Encryption Standard
Okazaki, Hiroyuki, Shidama, Yasunari
Finite Dimensional Real Normed Spaces are Proper Metric Spaces
Nakasho, Kazuhisa, Okazaki, Hiroyuki, Shidama, Yasunari
Definition of Flat Poset and Existence Theorems for Recursive Call
Ishida, Kazuhisa, Shidama, Yasunari, Grabowski, Adam