File: zfpole.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.

complex(8) function zfpole(c,z)
use modgw
implicit none
! arguments
complex(8), intent(in) :: c(*),z
! local variables
integer i,j
real(8) t1
complex(8) z1
zfpole=c(1)
i=2
do j=1,npole
  z1=c(i)+z
  t1=abs(dble(z1))+abs(aimag(z1))
  if (t1.gt.1.d-8) zfpole=zfpole+c(i+1)/z1
  i=i+2
end do
return
end function