ATOMFT ver. 3.11, copyright(C) 1979-93, Y. F. Chang.
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COPTION DOUBLE,DUMP=1
      DIFF ( Y , X , 1 ) =  TANH (3.0 * X + 1.0 )
   $
   $
      MPRINT = 2
      NSTEPS = 1000
      START = 1.1d0
      END = 2.0d0
      DLTXPT = 0.1d0
      Y(1) = (DLOG(DCOSH(3.0d0*START + 1.0d0))/3.0d0);
      WRITE(LIST,120) START,END,DLTXPT,Y(1)
  120 FORMAT(8F16.10)
   $
   $
          ATOMFT completed