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Ptolemy’s Theorem and the Almagest: we just found the best visual proof in 2000 years
First, after watching the last Mathologer video mathematician Rainer Lang sent me his visual proof of Ptolemy’s theorem. In my opinion Rainer's new proof is the simplest and most powerful visual proof ...
Stephen Graham of 'Adolescence' says research took its co-writer down 'a lot of dark holes' ...
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