polefit.f90

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! Copyright (C) 2017 J. K. Dewhurst, S. Sharma and E. K. U. Gross.
! This file is distributed under the terms of the GNU General Public License.
! See the file COPYING for license details.
 
real(8) function polefit(zfm,c)
use modgw
implicit none
! arguments
complex(8), intent(in) :: zfm(0:nwfm),c(2*npole+1)
! local variables
integer iw
complex(8) z1
! external functions
complex(8), external :: zfpole
polefit=0.d0
do iw=0,nwfm
  z1=zfm(iw)-zfpole(c,wfm(iw))
  polefit=polefit+z1%re**2+z1%im**2
end do
end function