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George H.'s avatar

This was fun. thanks. The group theory stuff, reminds me of quaternions (and octonions (which now I've checked the spelling is my sum knowledge of octonions.)) As complex numbers are an extension of real numbers into another dimension, quaternions extend numbers into four dimensions. And for a math reason I don't know/understand you can't make a number system in three dimensions. And the only other system you can make a useful number in is eight. There's a nice three blue one brown video on quaternions. (I guess most of this comment was for your other readers... A good biography of William Rowan Hamilton?)

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Marisa's avatar

That was great, but it makes me wish I were smarter. How accessible is the book? And is there a book that talks about the stuff you said about music and gravity and suchlike? I think you said that wasn’t in Klein’s book.

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