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How do I put a derivative into an integrand in fortran 
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#1
Feb2712, 04:05 PM

P: 5

I want to make a program to evaluate the expectation energies of they hydrogen atom hamiltonian. This is going to involve evaluating the second derivative of the wave function in the integrand. I'm still a beginner and only know how to numerically calculate derivatives, but am not sure how I would code the integral of
∫f(x)(d^2/dx^2 + V(x))f(x)dx Any advice for how to do this? 


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