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Aug 17, 2019 at 10:05 comment added Wlod AA Godel's theorem was proved several years earlier by Emil Leon Post. The proofs were not identical. Just in case, one could learn the Post's proof.
Aug 16, 2019 at 13:23 answer added user44143 timeline score: 6
Sep 8, 2017 at 17:46 vote accept Ruizhi Yang
Sep 8, 2017 at 17:38 comment added Wojowu What do you mean by "arithmetic" here? PA, Robinson's Q,...?
Sep 8, 2017 at 17:37 answer added Emil Jeřábek timeline score: 24
Sep 8, 2017 at 17:22 history asked Ruizhi Yang CC BY-SA 3.0