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1. If a unitary operator U can be written as 1 + iεF, where ε is infinitesimally small, then the operator F must be Hermitian. 2. The commutator [AB, C] can be expressed in terms of [A, C] and [B, C]. Similarly, [A, BC] can be expanded. 3. The commutators [p, x] = -iħ, [p, xn] = -niħxn-1 for n > 1, and [p, A] = -iħ dA/dx if A is a differentiable function of x, where p = -iħ
- Author
- Joey
- Language
- EN