LAPACK-3.2.1 errata file
updated on Sun May 10 2009
maintained by J. Langou, U. Colorado Denver


Corrected in SVN -- to be released in 3.2.2
===========================================

(*) bug :: CSYEQUB/ZSYEQUB/SSYEQUB/DSYEQUB/CHEEQUB/CHEEQUB: EXTERNAL and INTRINSIC list are not accurate (or not even present) 
(*) svn :: r660

    o bug report sent by Alexander V. Kobotov (Intel) on Mon, 6 Apr 2009 to "lapack@cs.utk.edu".
      "c(he/sy)equb: no slamch in external lists and lsame, intrinsics not described"
      Same problem for D and S versions and for the WORK array.
    o committed by Julien Langou (SVN revision 660 on Sun May 10 2009)

(*) bug :: referencing WORK(1) and IWORK(1) when IJOB=0 in CTGSEN/DTGSEN/STGSEN/ZTGSEN contradicts header description
(*) svn :: r658,659

    o bug report sent by Alexander V. Kobotov (Intel) on Mon, 6 Apr 2009 to "lapack@cs.utk.edu".
      "(d/s)tgsen.f: iwork(1) always referenced: line 455: iwork( 1 ) = LIWMIN, documentation says that
      if IJOB=0 it shouldn't, so NULL pointer causes a segfault."
      Same problem for C and Z versions and for the WORK array.
    o committed by Julien Langou (SVN revision 658 and 659, on Sun May 10 2009)

(*) bug :: problem in workspace query for CGEESX/DGEESX/SGEESX/ZGEESX
(*) svn :: r657

    o bug report sent by Alexander V. Kobotov (Intel) on Mon, 6 Apr 2009 to "lapack@cs.utk.edu".
      "(c/z)geesx: no lwork=-1 branch at all, info = -15 is returned while doing lquery."
      The S and D versions were not exiting after WORKSPACE query as well.
    o committed by Julien Langou (SVN revision 657, on Sun May 10 2009)

(*) bug :: in CHBGST/ZHBGST, reference to unitialized elements of RWORK in the DO 240 and DO 470 loops
(*) svn :: r656

    o patch given by Lawrence Mulholland (NAG) on Wed May 06 2009 
    o see forum topic 1408
    o committed by Julien Langou (SVN revision 656, on Sun May 10 2009)

Confirmed problems -- bug needs to be fixed!
============================================

(*) bug     :: output argumement SCALE is not set when N=0
(*) project :: scalapack installer

    o reported by Miska Le Louarn on Tue Mar 3 2009
    o confirmed by Julie Langou on Tue Mar 3 2009
    o see: emails

(*) bug :: 'make install' generates a "*** Error: Time for operations was zero" too easily
(*) bug :: negative flop counts can be generated by 'make install'

    o reported by Sergei Steshenko on Thu Nov 20 2008
    o see: emails

(*) bug :: in DGESDD, workspace query gives a value smaller than the minimal value given in the header to run the routine

    o reported by  Guy Bencteux on Sat Dec 06 2008
    o see forum topic 846

(*) bug :: workspace query bug with DGEJSV (when only left or right singular vectors desired)

    o reported by Allin Cottrell on Tue Jan 15 2009
    o confirmed by Julien Langou on Fri Jan 30 2009
    o see forum topic 866
    o all information sent to Zlatko Drmac

Bug reports -- bug needs to be confirmed!
=========================================

(*) bug :: serious problem in DGESDD: DGESDD returns negative singular values with INFO = 0

    o reported by Guy Bencteux on Sat Dec 06 2008
    o see forum topic 847

(*) bug :: problem when playing with DGEEV and gfortran optimization flags

    o reported by Pauli Virtanen (scipy team) on Sat Dec 06 2008 (email to lapack@cs.utk.edu)
    o see: email from Pauli Virtanen
      see: http://scipy.org/scipy/scipy/ticket/709

(*) bug :: misleading comment in the header of DGHEQZ, the 2x2 block of the real Schur form are not as claimed

    o reported by Vasile Sima on Tue Jan 27 2009
    o see: email from Vasile
    o more information:
      more specifically Vasile is reporting that the comments:

*          [...] H contains the upper quasi-triangular
*          matrix S from the generalized Schur factorization;
*          2-by-2 diagonal blocks (corresponding to complex conjugate
*          pairs of eigenvalues) are returned in standard form, with
*          H(i,i) = H(i+1,i+1) and H(i+1,i)*H(i,i+1) < 0.

     are not correct

(*) bug :: failure of convergence of DHGEQZ for some specific matrix pencils

    o reported by Vasile Sima on Thu Jan 22 2009
    o see: email from Vasile
    o more information at: lapack known issues
     
(*) bug :: problem of WORKSPACE query with DSTEDC

    o reported by Tiago Requeijo on Mon Mar 30 2009
    o see forum topic 1389

Deprecated routines
===================

(*) dead code :: xLAHRD is now replaced by xLAHR2, xLAHRD is a dead code since LAPACK 3.1

    o xLAHRD will be removed at some point in the future from the distribution

Previous Errata (LAPACK 3.2.x) 
=============================

   o Fri Apr 17 2009 (LAPACK-3.2.1)
   o Tue Mar 10 2009 (LAPACK-3.2.0)
   o Tue Mar 03 2009 (LAPACK-3.2.0)
   o Mon Mar 02 2009 (LAPACK-3.2.0)
   o Mon Feb 01 2009 (LAPACK-3.2.0)