Show that parity invariance (5.31) leads to parity conservation, that is [H, P] = 0, where P
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Show that parity invariance (5.31) leads to parity conservation, that is [H, P̂] = 0, where
P̂ Ψ(r1 , r2, . . . , t) = P1P2 · · · Ψ(−r1,−r2, . . . , t).
Equation 531
H(r'1, r'2, . . .) = H(−r1,−r2, . . .) = H (r1, r2, . . .).
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