You are correct about what rint13.f does. It is a Simpson integrations
using equal spacing (from the logarithm of the radial mesh). It is not
written in the most clear code, you may want to compare it to charge*.f
elsewhere which is cleaner.
N.B., in parts of the code charge*.f has been changed to
Dear Wien2k-team
I am currently implementing a program that will compute the overlap between
various (L)APW(+lo) eigenfunctions extracted from Wien2k-simulations. As I
understand, the subroutine RINT13 computes the radial integral over
two-component radial functions on an exponential mesh, which i
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