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He's also very active at Stack Exchange – https://stackexchange.com/users/510234/joel-david-hamkins https://stackexchange.com/users/510234/joel-david-hamkins
by emil-lp 8mo ago
He's also very active at Stack Exchange
– https://stackexchange.com/users/510234/joel-david-hamkins https://stackexchange.com/users/510234/joel-david-hamkins
– https://mathoverflow.net/users/1946/joel-david-hamkins https://mathoverflow.net/users/1946/joel-david-hamkins