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-C Milne spacetime metric ?!?!?
-C Suggested by Matteo Rossi and E. Onofri (Univ. di Parma, Italy)
-C They inted to use thsi metric for simulating an Pre-Big-Bang
-C Cosmology, as proposed by Veneziano some year ago 
-C Author : D. Vulcanov (Timsoara, Romania)
-C $Header$
-
-#include "cctk.h"
-
-      subroutine Exact__Milne(
-     $     x, y, z, t,
-     $     gdtt, gdtx, gdty, gdtz, 
-     $     gdxx, gdyy, gdzz, gdxy, gdyz, gdzx,
-     $     gutt, gutx, guty, gutz, 
-     $     guxx, guyy, guzz, guxy, guyz, guzx)
-
-      implicit none
-
-c     Input.
-
-      CCTK_REAL x, y, z, t
-
-c     Output.
-
-      CCTK_REAL gdtt, gdtx, gdty, gdtz, 
-     $       gdxx, gdyy, gdzz, gdxy, gdyz, gdzx,
-     $       gutt, gutx, guty, gutz, 
-     $       guxx, guyy, guzz, guxy, guyz, guzx,
-     $       coef, x2,y2,z2,t2
-
-      x2= x*x
-      y2= y*y
-      z2= z*z
-      t2= t*t
-      coef= t2/(1.d0+ x2 +y2+ z2)
-
-      gdtt = -1.d0 
-      gdtx = 0.d0  
-      gdty = 0.d0 
-      gdtz = 0.d0 
-      gdxx =  coef*(1.d0+y2+z2) 
-      gdyy =  coef*(1.d0+x2+z2) 
-      gdzz =  coef*(1.d0+x2+y2)
-      gdxy = -coef*x*y 
-      gdyz = -coef*y*z 
-      gdzx = -coef*x*z
-
-      gutt = -1.d0 
-      gutx = 0.d0 
-      guty = 0.d0 
-      gutz = 0.d0 
-      guxx = (1.d0+x2)/(t2)
-      guyy = (1.d0+y2)/(t2)
-      guzz = (1.d0+z2)/(t2)
-      guxy = x*y/(t2)
-      guyz = y*z/(t2) 
-      guzx = x*z/(t2)
-
-
-      return
-      end