 
      FUNCTION ALBETA(A,B)
C***BEGIN PROLOGUE  ALBETA
C***DATE WRITTEN   770701   (YYMMDD)
C***REVISION DATE  820801   (YYMMDD)
C***CATEGORY NO.  C7B
C***KEYWORDS  BETA FUNCTION,COMLETE BETA FUNCTION,LOGARITHM,
C             SPECIAL FUNCTION
C***AUTHOR  FULLERTON, W., (LANL)
C***PURPOSE  Computes the natural log of the complete Beta function.
C***DESCRIPTION
C
C ALBETA computes the natural log of the complete beta function.
C
C Input Parameters:
C       A   real and positive
C       B   real and positive
C***REFERENCES  (NONE)
C***ROUTINES CALLED  ALNGAM,ALNREL,GAMMA,R9LGMC,XERROR
C***END PROLOGUE  ALBETA
 
 
