Root systems -- Lie algebras 20

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[@noahtaul]

30:15 To anyone watching this, I encourage you to look up a computer-drawn version of this root system, called the G2 root system. Michael’s picture doesn’t do it justice; it’s two interweaving copies of the upper right system rotated 30 degrees and scaled by a factor of sqrt(3) from each other.

[@lormador8493]

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