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Quaternion Rotations, Claude, and Lean

30 · John Cook · June 15, 2026, 7:54 p.m.
Math Formal methods lean Quaternions coding practices AI in software development Typographical Errors Quaternion Rotations
Summary
The author discusses an email they received about a typo in a previous post on quaternion and rotation matrix conversion, and their experience using an AI model named Claude to identify the typo instead of doing it manually.
Read full post on www.johndcook.com →
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