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subroutine runY_i1i2i3(i,j,i1,i2,i3,f,Xtwiddle,Gtt,Gtwiddle,Shat4,
. Czero3,N0)
implicit none
C--- Expression for Eq. 5.61
include 'lib/TensorReduction/Include/types.f'
include 'lib/TensorReduction/Include/TRconstants.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,i,j,i1,i2,i3,n,m,np
parameter(np=3)
real(dp)::
. Xtwiddle(0:np,0:np),Gtwiddle(np,np),f(np),Gtt(np,np,np,np)
complex(dp) Shat4(np,z3max,-2:0),Czero3(z3max,-2:0),bit,pole
do ep=-2,0
bit=czip
do n=1,np
do m=1,np
bit=bit+Gtt(i,n,j,m)*f(n)
. *(Shat4(m,z3(i1,i2,i3),ep)
. -2d0*delta(m,i1)*Dv(dzzii(z2(i2,i3))+N0,ep)
. -2d0*delta(m,i2)*Dv(dzzii(z2(i3,i1))+N0,ep)
. -2d0*delta(m,i3)*Dv(dzzii(z2(i1,i2))+N0,ep))
enddo
enddo
pole=czip
if (ep .gt. -2) pole=-4*Dv(dzziii(z3(i1,i2,i3))+N0,ep-1)
Dv(diii(z3(i1,i2,i3))+N0,ep)=
. (Gtwiddle(i,j)
. *(8*Dv(dzziii(z3(i1,i2,i3))+N0,ep)+pole-Czero3(z3(i1,i2,i3),ep))
. +bit+Xtwiddle(0,j)*Dv(diiii(z4(i,i1,i2,i3))+N0,ep))/Xtwiddle(i,j)
enddo
return
end