log

age author description
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
Mon, 03 Jun 2019 12:29:33 +0900 Shinji KONO remove ∅-base-def