SLATEC Routines --- XQNU ---

*DECK XQNU
      SUBROUTINE XQNU (NU1, NU2, MU1, THETA, X, SX, ID, PQA, IPQA,
     1   IERROR)
C***BEGIN PROLOGUE  XQNU
C***SUBSIDIARY
C***PURPOSE  To compute the values of Legendre functions for XLEGF.
C            Method: backward nu-wise recurrence for Q(MU,NU,X) for
C            fixed mu to obtain Q(MU1,NU1,X), Q(MU1,NU1+1,X), ...,
C            Q(MU1,NU2,X).
C***LIBRARY   SLATEC
C***CATEGORY  C3A2, C9
C***TYPE      SINGLE PRECISION (XQNU-S, DXQNU-D)
C***KEYWORDS  LEGENDRE FUNCTIONS
C***AUTHOR  Smith, John M., (NBS and George Mason University)
C***ROUTINES CALLED  XADD, XADJ, XPQNU
C***REVISION HISTORY  (YYMMDD)
C   820728  DATE WRITTEN
C   890126  Revised to meet SLATEC CML recommendations.  (DWL and JMS)
C   901019  Revisions to prologue.  (DWL and WRB)
C   901106  Corrected order of sections in prologue and added TYPE
C           section.  (WRB)
C   920127  Revised PURPOSE section of prologue.  (DWL)
C***END PROLOGUE  XQNU