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Jan 15, 2020 at 2:39 comment added Jim Humphreys There seems to be some confusion about the difference between "A. Milgram" and "R.J. Milgram". The latter used a version of his middle name "James" and was a prolific algebraic topologist at Stanford (now retired).
Jan 13, 2020 at 9:41 comment added Neil Strickland @RobertBruner It would be great if you could add more details
Jan 11, 2020 at 13:55 vote accept Alex Gavrilov
Jan 10, 2020 at 17:19 comment added Alex Gavrilov Thank you. So this is where the mistake was. By the way, in the Remark I mentioned Mahowald have really said "it can be shown that $\theta_4^2=0$". And yes it can, except this was actually done 40+ years later! (Theorem 1.2 in this paper of Xu.) Amazing. I am still curious though why Shtan'ko counted the problem as solved in 1970s. Was there a time when experts were optimistic about it?
Jan 10, 2020 at 16:31 history answered Gjergji Zaimi CC BY-SA 4.0