perhaps *this* will refresh your memory

here on the front of one big envelope are
four versions of the “binary tetrahedral group”:
HU-code,, permos, generators, & matrices.
taken together they form “the BT rosetta stone”.
i posted a bigger version a few days ago.

there’s a semester’s worth of algebra in that display.
i know because it took me much longer than that
to figure out how to do it.

Photo on 6-8-20 at 7.03 PM


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