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Oct 4, 2017 at 21:00 history bumped CommunityBot This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Sep 4, 2017 at 20:55 history bumped CommunityBot This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Aug 5, 2017 at 20:29 history edited mathematrucker CC BY-SA 3.0
added a couple more questions
Aug 5, 2017 at 20:26 answer added mathematrucker timeline score: 2
Jul 22, 2017 at 15:37 comment added mathematrucker @bof see my response above.
Jul 22, 2017 at 15:35 history edited mathematrucker CC BY-SA 3.0
added clarifying details and historical background
Jul 22, 2017 at 6:37 comment added bof The domain of the operation $u$ is the power set $\mathscr P(S),$ but the condition on $uA$ is only required to hold when $A$ is an element of the partition $P?$ So $uA$ is completely arbitrary for $A\in\mathscr P(S)\setminus P?$
Jul 22, 2017 at 1:17 history asked mathematrucker CC BY-SA 3.0