Σ(E-E%)cm) (43 E)cm (VV) = VHV + EVV). .0 m m#n If= = n, the left side is zero, and we recover Equation 7.9; ifl #n, we get (Ei - E) c") = -(vi|H|VO). n
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Could you explain what happened to the left hand side of the equation? I understand that if l is not equal n then the second term of right hand side is zero, but i don't understand what happened to the sum to the left.
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