subroutine renormalization_factor_SRG(eta,nBas,nC,nO,nV,nR,nS,e,Omega,rho,Z)

! Compute renormalization factor for GW

  implicit none
  include 'parameters.h'

! Input variables

  double precision,intent(in)   :: eta
  integer,intent(in)            :: nBas
  integer,intent(in)            :: nC
  integer,intent(in)            :: nO
  integer,intent(in)            :: nV
  integer,intent(in)            :: nR
  integer,intent(in)            :: nS
  double precision,intent(in)   :: e(nBas)
  double precision,intent(in)   :: Omega(nS)
  double precision,intent(in)   :: rho(nBas,nBas,nS)

! Local variables

  integer                       :: p,i,a,jb
  double precision              :: eps

! Output variables

  double precision,intent(out)  :: Z(nBas)

! Initialize

  Z(:)  = 0d0

! Compute renormalization factor from derivative of SigC
 
  Z(:) = 1d0/(1d0 - Z(:))

end subroutine renormalization_factor_SRG