SLATEC Routines --- DBETA ---

*DECK DBETA
      DOUBLE PRECISION FUNCTION DBETA (A, B)
C***BEGIN PROLOGUE  DBETA
C***PURPOSE  Compute the complete Beta function.
C***LIBRARY   SLATEC (FNLIB)
C***CATEGORY  C7B
C***TYPE      DOUBLE PRECISION (BETA-S, DBETA-D, CBETA-C)
C***KEYWORDS  COMPLETE BETA FUNCTION, FNLIB, SPECIAL FUNCTIONS
C***AUTHOR  Fullerton, W., (LANL)
C***DESCRIPTION
C
C DBETA(A,B) calculates the double precision complete beta function
C for double precision arguments A and B.
C
C***REFERENCES  (NONE)
C***ROUTINES CALLED  D1MACH, DGAMLM, DGAMMA, DLBETA, 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  DBETA