# dlbeta.f

          DOUBLE PRECISION FUNCTION DLBETA (A, B)
    C***BEGIN PROLOGUE  DLBETA
    C***PURPOSE  Compute the natural logarithm of the complete Beta
    C            function.
    C***LIBRARY   SLATEC (FNLIB)
    C***CATEGORY  C7B
    C***TYPE      DOUBLE PRECISION (ALBETA-S, DLBETA-D, CLBETA-C)
    C***KEYWORDS  FNLIB, LOGARITHM OF THE COMPLETE BETA FUNCTION,
    C             SPECIAL FUNCTIONS
    C***AUTHOR  Fullerton, W., (LANL)
    C***DESCRIPTION
    C
    C DLBETA(A,B) calculates the double precision natural logarithm of
    C the complete beta function for double precision arguments
    C A and B.
    C
    C***REFERENCES  (NONE)
    C***ROUTINES CALLED  D9LGMC, DGAMMA, DLNGAM, DLNREL, XERMSG
    C***REVISION HISTORY  (YYMMDD)
    C   770701  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  DLBETA