.@sigfig This seems legit.pic.twitter.com/ifqMEJU2pB
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I worked in Polynomial Chaos a while ago in systems with hammerstein nonlinearities, it was exceptionally cool but extremely dense.
weird how the author forgot you can take a summation of a product space instead of eight summations
There was a Sigma surplus so they were cheap
I was about to say "that looks like my time series textbook and my copy of Greene's econometrics fucked on ecstasy"
I mean that's kind of what the technique is
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