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ME: what's a quaternion?

NERD: it's a four-dimensional complex number of the form (a + bi + cj + dk) where a, b, c and d are real numbers and i^2 = j^2 = k^2 = ijk = -1!

ME: ok. i understand that. but don't people use these for 3d rotations?

NERD: yeah!

ME: how?

NERD:

NERD:

NERD: well, you see, they're very important to use for rotations because they prevent gimbal lock,

@prophet_goddess thatâ€™s not entirely untrue. the idea of university being for anyone other than the ruling class is extremely recent, and so a good proportion of its trappings are just about teaching you basically rich people gang signs.

the fact that mathematics turned out to be useful for things other than than games for rich kids is kind of an accident.

@zensaiyuki there is perhaps no field more prone to this than economics.

Zen@zensaiyuki@mastodon.social@prophet_goddess *snicker* he doesnâ€™t understand the three seashells.