2MiB, 512x512, 1571376558131.gif View SameGoogleiqdbSauceNAO Anonymous Wed 08 Sep 23:21:16 2021 No.13619405 ViewReplyOriginalReport Quoted By: >>13619461 >>13619807 >>13619987 >>13620440 Are there any examples in the history of mathematics where a result was widely believed to be true with a non-rigorous proof, but later rigorous methods showed it to be not true?