Commutator product rule
= Commutator product rule
For <linear operators> on a common invariant domain, $[A,BC]=[A,B]C+B[A,C]$. The identity follows by adding and subtracting $BAC$ in the <commutator>.
= Commutator product rule
For <linear operators> on a common invariant domain, $[A,BC]=[A,B]C+B[A,C]$. The identity follows by adding and subtracting $BAC$ in the <commutator>.