SLATEC Routines --- U11US ---

*DECK U11US
      SUBROUTINE U11US (A, MDA, M, N, UB, DB, MODE, NP, KRANK, KSURE, H,
     +   W, EB, IR, IC)
C***BEGIN PROLOGUE  U11US
C***SUBSIDIARY
C***PURPOSE  Subsidiary to ULSIA
C***LIBRARY   SLATEC
C***TYPE      SINGLE PRECISION (U11US-S, DU11US-D)
C***AUTHOR  (UNKNOWN)
C***DESCRIPTION
C
C       This routine performs an LQ factorization of the
C       matrix A using Householder transformations. Row
C       and column pivots are chosen to reduce the growth
C       of round-off and to help detect possible rank
C       deficiency.
C
C***SEE ALSO  ULSIA
C***ROUTINES CALLED  ISAMAX, ISWAP, SAXPY, SDOT, SNRM2, SSCAL, SSWAP,
C                    XERMSG
C***REVISION HISTORY  (YYMMDD)
C   810801  DATE WRITTEN
C   890531  Changed all specific intrinsics to generic.  (WRB)
C   890831  Modified array declarations.  (WRB)
C   891214  Prologue converted to Version 4.0 format.  (BAB)
C   900315  CALLs to XERROR changed to CALLs to XERMSG.  (THJ)
C   900328  Added TYPE section.  (WRB)
C***END PROLOGUE  U11US