History

Time	Change
2016-07-26 08:10:49+00:00	Associated with φ
2016-07-26 08:10:49+00:00	Associated with Φ
2016-07-26 08:10:49+00:00	Associated with EMPTY SET
2016-07-26 08:10:49+00:00	Associated with empty set
2016-07-31 02:27:46+00:00	Disassociated from EMPTY SET