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Trailing-Edge - PDP-10 Archives - decuslib20-05 - decus/20-0137/fct.f4
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      SUBROUTINE FCT(X,Y,D)
      DIMENSION Y(1),D(1)
      D(1) = 1.0/Y(2)                                                        
      D(2) = - (1.0/Y(1))                                                    
      RETURN
      END