COPTION DOUBLE,DUMP=1
      DIFF ( Y , X , 1 ) = - 2.0 * X / (X *  X + 1.0) /( X * X + 1.0)
   $
   $
      MPRINT = 2
      NSTEPS = 1000
      START = -2.0d0
      END = -1.0d0
      DLTXPT = 0.1d0
      Y(1) = (1.0d0 / (START * START + 1.0d0))
      WRITE(LIST,120) START,END,DLTXPT,Y(1)
  120 FORMAT(8F16.10)
   $
   $
C DIGITS := 32;
C MAX_TERMS := 40;
C !
C X_START := -2.0;
C X_END := -1.0;
C DIFF(Y,0,EXACT_SOLN_Y(X_START));
C GLOB_LOOK_POLES := TRUE;
C GLOB_MAX_H := 0.1;
C # GLOB_MIN_H := 0.1;
C #
C # NOT GIVEN = 0
C # REAL = 1
C # COMPLEX = 2 
C # NO POLE = 3
C # IMPOSSIBLE EQ = 4
C #
C GLOB_TYPE_GIVEN_POLE := 2;
C #  REAL PART 
C ARRAY_GIVEN_RAD_POLES[1,1] := 0.0;  
C # IMAG PART 
C ARRAY_GIVEN_RAD_POLES[1,2] := 1.0;
C # ORDER 
C ARRAY_GIVEN_ORD_POLES[1,1] := 1.0; 
C # NOT USED
C ARRAY_GIVEN_ORD_POLES[1,2] := 0.0;  
C 
C !
C EXACT_SOLN_Y := PROC(X)
C RETURN(1.0 / (X * X + 1.0));
C END;
C 
C