subroutine runY_00i1i2(k,l,i1,i2,Xtwiddle,Gtwiddle,Shat4,N0)
      implicit none
C---  Expression for Eq. 5.58c
C---  Calculates D00i1i2, requires D00li1,D00li2
C---  Small terms of order Xtwiddle(0,k)*Diii,Xtwiddle(0,0)*Diiii
C---  Denominator Gtwiddle(k,l)
      include 'lib/TensorReduction/Include/types.f'
      include 'lib/TensorReduction/Include/pvDnames.f' 
      include 'lib/TensorReduction/Include/pvDv.f' 
      include 'lib/TensorReduction/recur/Include/Darraydef.f' 
      include 'lib/TensorReduction/recur/Include/Darrays.f' 
      integer ep,N0,k,l,i1,i2,np
      parameter(np=3)
      real(dp):: Xtwiddle(0:np,0:np),Gtwiddle(np,np)
      complex(dp):: Shat4(np,z3max,-2:0)

      if (  (i1 .eq. l) .or. (i2 .eq. l)
     . .or. (i1 .eq. 0) .or. (i2 .eq. 0)) then
      return
      endif

      do ep=-2,0

      Dv(dzzii(z2(i1,i2))+N0,ep)=
     .(-2*Gtwiddle(k,i1)*Dv(dzzii(z2(l,i2))+N0,ep)
     . -2*Gtwiddle(k,i2)*Dv(dzzii(z2(l,i1))+N0,ep)
     . +Gtwiddle(k,1)*Shat4(1,z3(l,i1,i2),ep)
     . +Gtwiddle(k,2)*Shat4(2,z3(l,i1,i2),ep)
     . +Gtwiddle(k,3)*Shat4(3,z3(l,i1,i2),ep)
     . +Xtwiddle(0,k)*Dv(diii(z3(l,i1,i2))+N0,ep)
     . -Xtwiddle(0,0)*Dv(diiii(z4(k,l,i1,i2))+N0,ep))/(2*Gtwiddle(k,l))
      enddo


      return
      end