note that in the second identity the matrix is actually σₓ, one of the 3 Pauli matrices
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Writing the product rule with matrices .. not sure if these mean anything but thought it was kinda neatpic.twitter.com/LUISSPOeVZ
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i was thinking the exactly same thing! haha
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But you'll need an n-dimensional tensor to generalize to e.g. d(f_1*...*f_n)/dx.
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pretty simple though since the contraction tensor is just Levi Civita
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because you root for the dodgers
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"There is only one derivative, and it is the exterior derivative. Cartan is its prophet. Amen." -- attributed to S-S Chern
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