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Jun 22, 2021 at 22:40 comment added michael hrusak These are fun questions. I do not see at the moment even that $\mathfrak a_3\not =\omega_1$.
Jun 22, 2021 at 21:31 answer added michael hrusak timeline score: 6
Jun 10, 2021 at 8:08 history asked Joel David Hamkins CC BY-SA 4.0