Ben Lynn

crypto.stanford.edu/~blynn

A cabinet of computational curiosities: context-free parser , Enigma , geometric algebra , Life , neural network .

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Visit crypto.stanford.edu/~blynn → On Hacker News Jun 2012 – Mar 2021

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All Hail Geometric Algebra

2020290 points80 commentscited by 5Math & Algorithms details

Rotate a cube by 90 degrees around the \(x\)-axis, then rotate it by 90 degrees around the \(z\)-axis. This is equivalent to a single rotation. What is the axis and angle of this single rotation?