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 Jan 11 awarded Popular Question Sep 24 awarded Autobiographer Jan 25 accepted Is this a new formula? Jan 25 comment Is this a new formula? Ah, too bad. Thanks for the writeup. Jan 25 awarded Commentator Jan 24 asked Is this a new formula? Dec 12 comment “Converting” equivalence relations to partitions Thanks. Good post. Dec 12 accepted “Converting” equivalence relations to partitions Dec 10 comment “Converting” equivalence relations to partitions I know the theorem. But I'd like to know whether there's an easy way to do the conversion based on the implicit definition of the relation, because, technically, this doesn't seem to be that easy all the time. Dec 10 asked “Converting” equivalence relations to partitions Nov 16 accepted Cardinality of complementary set Nov 16 comment Cardinality of complementary set Edited my question. Nov 16 comment Cardinality of complementary set Looks good. I'm not talking about infinite stuff, though. Sorry, edited my question. Nov 16 revised Cardinality of complementary set added 422 characters in body Nov 16 awarded Student Nov 16 asked Cardinality of complementary set Nov 2 awarded Scholar Nov 2 awarded Supporter Nov 2 accepted Predicate logic: Two variables - same value allowed? Nov 2 comment Predicate logic: Two variables - same value allowed? Oh, and just FYI. The universes we're talking about were ${0,1}$, $\mathbb{Z}$, $\mathbb{Q}_{>0}$ and $\mathbb{R}$.