# d9lgmc.f

          DOUBLE PRECISION FUNCTION D9LGMC (X)
    C***BEGIN PROLOGUE  D9LGMC
    ....
    ....
    Warning:   this routine is not intended to be user-callable.
    ....
    ....
    C***SUBSIDIARY
    C***PURPOSE  Compute the log Gamma correction factor so that
    C            LOG(DGAMMA(X)) = LOG(SQRT(2*PI)) + (X-5.)*LOG(X) - X
    C            + D9LGMC(X).
    C***LIBRARY   SLATEC (FNLIB)
    C***CATEGORY  C7E
    C***TYPE      DOUBLE PRECISION (R9LGMC-S, D9LGMC-D, C9LGMC-C)
    C***KEYWORDS  COMPLETE GAMMA FUNCTION, CORRECTION TERM, FNLIB,
    C             LOG GAMMA, LOGARITHM, SPECIAL FUNCTIONS
    C***AUTHOR  Fullerton, W., (LANL)
    C***DESCRIPTION
    C
    C Compute the log gamma correction factor for X .GE. 10. so that
    C LOG (DGAMMA(X)) = LOG(SQRT(2*PI)) + (X-.5)*LOG(X) - X + D9lGMC(X)
    C
    C Series for ALGM       on the interval  0.          to  1.00000E-02
    C                                        with weighted error   1.28E-31
    C                                         log weighted error  30.89
    C                               significant figures required  29.81
    C                                    decimal places required  31.48
    C
    C***REFERENCES  (NONE)
    C***ROUTINES CALLED  D1MACH, DCSEVL, INITDS, XERMSG
    C***REVISION HISTORY  (YYMMDD)
    C   770601  DATE WRITTEN
    C   890531  Changed all specific intrinsics to generic.  (WRB)
    C   890531  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   900720  Routine changed from user-callable to subsidiary.  (WRB)
    C***END PROLOGUE  D9LGMC