Question: Prove that, for a system with a nondegenerate ground state, if ( is any normalized, well-behaved function that is not equal to the true ground-state

Prove that, for a system with a nondegenerate ground state,
S *Ao dr > E.

if ( is any normalized, well-behaved function that is not equal to the true ground-state wave function. Let b be a positive constant such that E1 + b

S *Ao dr > E.

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