subroutine phGRPAx(TDA,nBas,nC,nO,nV,nR,nS,ENuc,EHF,ERI,dipole_int,e)

! Perform random phase approximation calculation with exchange (aka TDHF)

  implicit none
  include 'parameters.h'
  include 'quadrature.h'

! Input variables

  logical,intent(in)            :: TDA
  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)   :: ENuc
  double precision,intent(in)   :: EHF
  double precision,intent(in)   :: e(nBas)
  double precision,intent(in)   :: ERI(nBas,nBas,nBas,nBas)
  double precision,intent(in)   :: dipole_int(nBas,nBas,ncart)

! Local variables

  integer                       :: ispin
  logical                       :: dRPA
  double precision,allocatable  :: Aph(:,:)
  double precision,allocatable  :: Bph(:,:)
  double precision,allocatable  :: Om(:)
  double precision,allocatable  :: XpY(:,:)
  double precision,allocatable  :: XmY(:,:)

  double precision              :: EcRPA

! Hello world

  write(*,*)
  write(*,*)'***********************************************************'
  write(*,*)'|  Random phase approximation calculation with exchange   |'
  write(*,*)'***********************************************************'
  write(*,*)

! TDA 

  if(TDA) then
    write(*,*) 'Tamm-Dancoff approximation activated!'
    write(*,*) ' => RPAx + TDA = CIS '
    write(*,*)
  end if

! Initialization

  dRPA = .false.

  EcRPA = 0d0

! Memory allocation

  allocate(Om(nS),XpY(nS,nS),XmY(nS,nS),Aph(nS,nS))
  if(.not.TDA) allocate(Bph(nS,nS))

  ispin = 3

  call phLR_A(ispin,dRPA,nBas,nC,nO,nV,nR,nS,1d0,e,ERI,Aph)
  if(.not.TDA) call phLR_B(ispin,dRPA,nBas,nC,nO,nV,nR,nS,1d0,ERI,Bph)

  call phLR(TDA,nS,Aph,Bph,EcRPA,Om,XpY,XmY)
  call print_excitation_energies('phRPAx@GHF',ispin,nS,Om)
  call phLR_transition_vectors(.true.,nBas,nC,nO,nV,nR,nS,dipole_int,Om,XpY,XmY)

  write(*,*)
  write(*,*)'-------------------------------------------------------------------------------'
  write(*,'(2X,A50,F20.10)') 'Tr@phRPAx correlation energy           =',EcRPA
  write(*,'(2X,A50,F20.10)') 'Tr@phRPAx total energy                 =',ENuc + EHF + EcRPA
  write(*,*)'-------------------------------------------------------------------------------'
  write(*,*)

end subroutine