dlngam.f
DOUBLE PRECISION FUNCTION DLNGAM (X)
C***BEGIN PROLOGUE DLNGAM
C***PURPOSE Compute the logarithm of the absolute value of the Gamma
C function.
C***LIBRARY SLATEC (FNLIB)
C***CATEGORY C7A
C***TYPE DOUBLE PRECISION (ALNGAM-S, DLNGAM-D, CLNGAM-C)
C***KEYWORDS ABSOLUTE VALUE, COMPLETE GAMMA FUNCTION, FNLIB, LOGARITHM,
C SPECIAL FUNCTIONS
C***AUTHOR Fullerton, W., (LANL)
C***DESCRIPTION
C
C DLNGAM(X) calculates the double precision logarithm of the
C absolute value of the Gamma function for double precision
C argument X.
C
C***REFERENCES (NONE)
C***ROUTINES CALLED D1MACH, D9LGMC, DGAMMA, 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 900727 Added EXTERNAL statement. (WRB)
C***END PROLOGUE DLNGAM