1*DECK DF1C
2      DOUBLE PRECISION FUNCTION DF1C (X)
3C***BEGIN PROLOGUE  DF1C
4C***PURPOSE  Subsidiary to
5C***LIBRARY   SLATEC
6C***AUTHOR  (UNKNOWN)
7C***ROUTINES CALLED  (NONE)
8C***REVISION HISTORY  (YYMMDD)
9C   ??????  DATE WRITTEN
10C   891214  Prologue converted to Version 4.0 format.  (BAB)
11C***END PROLOGUE  DF1C
12      DOUBLE PRECISION X
13C***FIRST EXECUTABLE STATEMENT  DF1C
14      DF1C = 0.0D+00
15      IF(X.NE.0.33D+00) DF1C = (X-0.5D+00)*ABS(X-0.33D+00)**(-0.9D+00)
16      RETURN
17      END
18