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 Oct21 comment Simplification of Equation Involving Second Partials Thanks so much Aleks. That's a neat trick. Oct21 awarded Supporter Oct21 accepted Simplification of Equation Involving Second Partials Oct21 asked Simplification of Equation Involving Second Partials Oct10 awarded Student Oct7 awarded Scholar Oct7 comment Commutator relationship proof $[A,B^2] = 2B[A,B]$ Alright, thanks for the help Logan. I just thought it would require some more rigor. Thanks! Oct7 accepted Commutator relationship proof $[A,B^2] = 2B[A,B]$ Oct7 comment Commutator relationship proof $[A,B^2] = 2B[A,B]$ These are supposed to be quantum mechanics operators. Well, I was hoping to show algebraically that [A,B] must necessarily be something like a constant. Oct7 awarded Editor Oct7 revised Commutator relationship proof $[A,B^2] = 2B[A,B]$ edited body Oct7 comment Commutator relationship proof $[A,B^2] = 2B[A,B]$ Yes I did, sorry. Oct7 asked Commutator relationship proof $[A,B^2] = 2B[A,B]$