log

age author description
Tue, 04 Jun 2019 12:28:43 +0900 Shinji KONO ...
Tue, 04 Jun 2019 09:22:45 +0900 Shinji KONO Union (x , y) == (x , y ) only true on infinite case
Tue, 04 Jun 2019 01:05:33 +0900 Shinji KONO simpler ordinal