 
      DOUBLE PRECISION FUNCTION DGAMMA(X)
C***BEGIN PROLOGUE  DGAMMA
C***DATE WRITTEN   770601   (YYMMDD)
C***REVISION DATE  820801   (YYMMDD)
C***CATEGORY NO.  C7A
C***KEYWORDS  COMPLETE GAMMA FUNCTION,DOUBLE PRECISION,GAMMA FUNCTION,
C             SPECIAL FUNCTION
C***AUTHOR  FULLERTON, W., (LANL)
C***PURPOSE  Computes the d.p. complete Gamma function.
C***DESCRIPTION
C
C DGAMMA(X) calculates the double precision complete gamma function
C for double precision argument X.
C
C Series for GAM        on the interval  0.          to  1.00000E+00
C                                        with weighted error   5.79E-32
C                                         log weighted error  31.24
C                               significant figures required  30.00
C                                    decimal places required  32.05
C***REFERENCES  (NONE)
C***ROUTINES CALLED  D1MACH,D9LGMC,DCSEVL,DGAMLM,DINT,INITDS,XERROR
C***END PROLOGUE  DGAMMA
 
 
