This identity pops up in a few nice places in algebraic calculus.pic.twitter.com/Nxq89wivDM
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I am a Cro-Magnon who prefers to scratch things down on paper/whiteboards when I know I really should immortalize it in latex and code.
I'm like that too, I call it being old-fashioned. We re becoming a rare breed. But I prefer Black boards and chalk to be honest.
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