Given some state [itex]\left|\psi\right\rangle[/itex], and two operators [itex]\hat{A}[/itex] and [itex]\hat{B}[/itex], how do you prove that if [itex]\langle\psi|\hat{A}|\psi\rangle = \langle\psi|\hat{B}| \psi\rangle[/itex] then [itex]\hat{A} = \hat{B}[/itex] ?(adsbygoogle = window.adsbygoogle || []).push({});

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# Proof: Operators with same expectation value

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