SLATEC Routines --- DGAMMA ---

*DECK DGAMMA
      DOUBLE PRECISION FUNCTION DGAMMA (X)
C***BEGIN PROLOGUE  DGAMMA
C***PURPOSE  Compute the complete Gamma function.
C***LIBRARY   SLATEC (FNLIB)
C***CATEGORY  C7A
C***TYPE      DOUBLE PRECISION (GAMMA-S, DGAMMA-D, CGAMMA-C)
C***KEYWORDS  COMPLETE GAMMA FUNCTION, FNLIB, SPECIAL FUNCTIONS
C***AUTHOR  Fullerton, W., (LANL)
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
C***REFERENCES  (NONE)
C***ROUTINES CALLED  D1MACH, D9LGMC, DCSEVL, DGAMLM, INITDS, XERMSG
C***REVISION HISTORY  (YYMMDD)
C   770601  DATE WRITTEN
C   890531  Changed all specific intrinsics to generic.  (WRB)
C   890911  Removed unnecessary intrinsics.  (WRB)
C   890911  REVISION DATE from Version 3.2
C   891214  Prologue converted to Version 4.0 format.  (BAB)
C   900315  CALLs to XERROR changed to CALLs to XERMSG.  (THJ)
C   920618  Removed space from variable name.  (RWC, WRB)
C***END PROLOGUE  DGAMMA