This identity pops up in a few nice places in algebraic calculus.pic.twitter.com/Nxq89wivDM
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yes mathpix is actually how i did this one because that's how lazy
@MathpixApp has made me lol - 1 more reply
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Where do I find frinds like you?
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not sure anybody like me exists tbh
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I would start the sum at i = k, to avoid things like "2 choose 3". People have defined binomial coefficients like "2 choose 3" but if you're gonna define them to be zero, which is what we need here, you might as well leave them out - so people don't need to scratch their heads.
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In the context of the larger thing I’m writing about, I’ve been explicit that 2 choose 3 would be 0
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-hand writes thesis and posts on twitter hoping he’ll TeX it for him-
Thanks. Twitter will use this to make your timeline better. UndoUndo
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