mirror of https://github.com/pfloos/quack
29 lines
608 B
Fortran
29 lines
608 B
Fortran
recursive function VRROv(AngMomA,ExpPi,CenterPA) &
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result(Ga)
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! Compute two-electron integrals over Gaussian geminals
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implicit none
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! Input variables
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integer,intent(in) :: AngMomA
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double precision,intent(in) :: ExpPi
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double precision,intent(in) :: CenterPA
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! Output variables
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double precision :: Ga
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if(AngMomA < 0) then
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Ga = 0d0
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else
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if(AngMomA == 0) then
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Ga = 1d0
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else
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Ga = CenterPA*VRROv(AngMomA-1,ExpPi,CenterPA) + 0.5d0*dble(AngMomA-1)*ExpPi*VRROv(AngMomA-2,ExpPi,CenterPA)
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endif
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endif
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end function VRROv
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