Joe Shipman proves marked ruler and compass solves the general quintic

By jjgreen · 2026-09-20 · 4 points · 0 comments

Saw this on the FOM mailing list, unfortunately the archive is down, so the posting verbatim below I just proved that marked ruler and compass solve the general quintic equation. Conway and I often talked about this problem. He’d have been so pleased to see I finally found the c…

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