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3 events
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May 4, 2016 at 14:39 comment added Lasse Rempe Something is wrong with your question. Your condition 2) implies that $\mathcal{G}$ contains only singleton sets, contradicting 3). 1) does not enter into it. What did you really mean? What is your motivation?
Jul 1, 2015 at 1:06 review First posts
Jul 1, 2015 at 5:36
Jul 1, 2015 at 1:01 history asked Pedro Perez CC BY-SA 3.0