Is my derivation of the action of the parity operator P on the |p⟩ representation correct?
(P˜ψ)(p)=−˜ψ(p).
Obtained from
(P˜ψ)(p)=1√2πℏ∫∞−∞dxe−iℏpx(Pψ)(x)=
=1√2πℏ∫∞−∞dxe−iℏpxψ(−x)=
=−1√2πℏ∫−∞∞dxe−iℏ(−p)xψ(x)=−˜ψ(p).
=1√2πℏ∫∞−∞dxe−iℏ(−p)xψ(x)=˜ψ(−p).
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