*DECK PPSGF
      FUNCTION PPSGF (X, IZ, C, A, BH)
C***BEGIN PROLOGUE  PPSGF
C***SUBSIDIARY
C***PURPOSE  Subsidiary to BLKTRI
C***LIBRARY   SLATEC
C***TYPE      SINGLE PRECISION (PPSGF-S)
C***AUTHOR  (UNKNOWN)
C***SEE ALSO  BLKTRI
C***ROUTINES CALLED  (NONE)
C***REVISION HISTORY  (YYMMDD)
C   801001  DATE WRITTEN
C   891214  Prologue converted to Version 4.0 format.  (BAB)
C   900402  Added TYPE section.  (WRB)
C***END PROLOGUE  PPSGF
      DIMENSION       A(*)       ,C(*)       ,BH(*)
C***FIRST EXECUTABLE STATEMENT  PPSGF
      SUM = 0.
      DO 101 J=1,IZ
         SUM = SUM-1./(X-BH(J))**2
  101 CONTINUE
      PPSGF = SUM
      RETURN
      END