SLATEC Routines --- ZUNHJ ---

*DECK ZUNHJ
      SUBROUTINE ZUNHJ (ZR, ZI, FNU, IPMTR, TOL, PHIR, PHII, ARGR, ARGI,
     +   ZETA1R, ZETA1I, ZETA2R, ZETA2I, ASUMR, ASUMI, BSUMR, BSUMI)
C***BEGIN PROLOGUE  ZUNHJ
C***SUBSIDIARY
C***PURPOSE  Subsidiary to ZBESI and ZBESK
C***LIBRARY   SLATEC
C***TYPE      ALL (CUNHJ-A, ZUNHJ-A)
C***AUTHOR  Amos, D. E., (SNL)
C***DESCRIPTION
C
C     REFERENCES
C         HANDBOOK OF MATHEMATICAL FUNCTIONS BY M. ABRAMOWITZ AND I.A.
C         STEGUN, AMS55, NATIONAL BUREAU OF STANDARDS, 1965, CHAPTER 9.
C
C         ASYMPTOTICS AND SPECIAL FUNCTIONS BY F.W.J. OLVER, ACADEMIC
C         PRESS, N.Y., 1974, PAGE 420
C
C     ABSTRACT
C         ZUNHJ COMPUTES PARAMETERS FOR BESSEL FUNCTIONS C(FNU,Z) =
C         J(FNU,Z), Y(FNU,Z) OR H(I,FNU,Z) I=1,2 FOR LARGE ORDERS FNU
C         BY MEANS OF THE UNIFORM ASYMPTOTIC EXPANSION
C
C         C(FNU,Z)=C1*PHI*( ASUM*AIRY(ARG) + C2*BSUM*DAIRY(ARG) )
C
C         FOR PROPER CHOICES OF C1, C2, AIRY AND DAIRY WHERE AIRY IS
C         AN AIRY FUNCTION AND DAIRY IS ITS DERIVATIVE.
C
C               (2/3)*FNU*ZETA**1.5 = ZETA1-ZETA2,
C
C         ZETA1=0.5*FNU*CLOG((1+W)/(1-W)), ZETA2=FNU*W FOR SCALING
C         PURPOSES IN AIRY FUNCTIONS FROM CAIRY OR CBIRY.
C
C         MCONJ=SIGN OF AIMAG(Z), BUT IS AMBIGUOUS WHEN Z IS REAL AND
C         MUST BE SPECIFIED. IPMTR=0 RETURNS ALL PARAMETERS. IPMTR=
C         1 COMPUTES ALL EXCEPT ASUM AND BSUM.
C
C***SEE ALSO  ZBESI, ZBESK
C***ROUTINES CALLED  D1MACH, ZABS, ZDIV, ZLOG, ZSQRT
C***REVISION HISTORY  (YYMMDD)
C   830501  DATE WRITTEN
C   910415  Prologue converted to Version 4.0 format.  (BAB)
C   930122  Added ZLOG and ZSQRT to EXTERNAL statement.  (RWC)
C***END PROLOGUE  ZUNHJ