@andy_matuschak have you seen this? Quaternion without complex numbers, using geometric algebra: https://probablydance.com/2017/08/05/intuitive-quaternions/ …
http://marctenbosch.com/quaternions/
Replying to @_chenglou
Nope, but will add to my list. Thank you!
9:10 AM - 16 Aug 2019
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