Sept 30, 2008, version 1.7.1

    * bug fix to cholmod_symmetry; it reported incorrectly if the matrix
        had a zero-free diagonal or not.  No effect on the use of CHOLMOD in
        MATLAB.  No effect on the mwrite function, either, which uses
        cholmod_symmetry.  Note that the number of nonzeros on the diagonal was
        (and still is) correctly computed.  Only effect is on the
        UF_Index.cholcand statistic reported in the UFget index, and on the web
        pages, for the UF Sparse Matrix Collection (the UF_Index.cholcand
        field).  This affects the output of spsym.

Sept 20, 2008, version 1.7.0

    * update for SuiteSparseQR:

	- add SuiteSparseQR knobs and stats to CHOLMOD Common
	- SuiteSparseQR uses CHOLMOD for its multifrontal symbolic analysis
	- changed (char *) input parameters to (const char *), to avoid
	    spurious compiler warnings when C++ calls C.
	- minor change to the AMD backup strategy in cholmod_analyze, to better
	    suit SuiteSparseQR
	- modified cholmod_analyze and cholmod_super_symbolic,
	    to add "for_cholesky" parameter; new function cholmod_analyze_p2.
	    This parameter is false for SuiteSparseQR.
	- minor correction to comments in cholmod_postorder.c
	- performance enhancement to supernodal symbolic analysis, when
	    A or AA' is fairly dense

Nov 1, 2007, version 1.6.0

    * minor lint cleanup (no bugs)

    * new CHOLMOD_CLEAR_FLAG macro, which speeds up the calls to
	cholmod_clear_flag, avoiding the function call if not needed.  Note
	that this leads to untested lines in the Tcov test, but the lines of
	the macro are tested in several places, just not everywhere it appers.

    * port to MATLAB 7.5 (mex -lmwblas option now required for Linux)

    * minor bug fix to cholmod_add.c to avoid potential Int overflow

    * extra option added to cholmod2 mexFunction

    * sparse2 mexFunction modified to ensure nnz(A) == nzmax(A) always holds
	(It didn't in v1.5.0 if numerically zero entries were dropped in A).

    * correction to Help comments for spsym function

    * bug fix to cholmod_symmetry.c: determination of Hermitian vs non-Hermitian
	matrices was incorrect if the diagonal was imaginary.

    * performance fix for cholmod_nesdis.c and nesdis mexFunction

May 31, 2007, version 1.5.0

    * 64-bit MATLAB interface
    
    * MATLAB interface back-ported to MATLAB 6.1.

    * bug fix: solving Dx=b using a supernodal factorization, in
	cholmod_l_solve, when sizeof(UF_long) > sizeof(BLAS integer)

    * changes to Makefiles to reflect directory changes in COLAMD and CCOLAMD
	v2.7.0 directory structure (CHOLMOD v1.5 requires v2.7.0 of those
	two packages)

    * update to Modify/cholmod_updown.c, to allow input vector R to be packed
	or unpacked.

    * bug fix to Tcov/huge.c test code, for 64-bit case (this has no effect
	on the CHOLMOD library itself, just the test code)

Dec 12, 2006, version 1.4.0

    * added support for large files (larger than 2GB)

    * minor MATLAB cleanup

    * renamed MATLAB function from cholmod to cholmod2, to avoid filename clash
	with itself (the built-in version of cholmod).

Dec 2, 2006, version 1.3.0

    * Major modification to cholmod_read.c; now fully supports all forms of the
	Matrix Market format.  Added cholmod_read_dense and cholmod_read_matrix
	functions to cholmod_read.c.  Major changes to mread MATLAB function.
	Added Common->prefer_binary option for cholmod_read.

    * Added cholmod_write.c (cholmod_write_sparse and cholmod_write_dense
	functions).  Added mwrite MATLAB function.

    * Added 2nd output argument to sparse2 (Z, binary pattern of explicit
	zero entries).

    * Added the function cholmod_symmetry to the MatrixOps module.
	Added spsym MATLAB function.

    * 2nd argument to cholmod_triplet_to_sparse changed from int to size_t.

    * minor correction to cholmod_analyze_ordering, cholmod_dense.c

    * minor change to cholmod_rowfac.c, cholmod_solve.c, ...
	to allow for easier testing.

Sept 28, 2006, version 1.2.1

    * bug fix to cholmod_matlab.c, when working with sparse INT64 matrices
	in the "sparse2" function

Aug 31, 2006, version 1.2

    * Common->default_nesdis parameter and Common->called_nd statistic added.
	Otherwise, no change to user interface.  v1.2 is fully upward
	compatible with v1.1 (even binary compatible).

    * non-supernodal Lx=b and L'x=b solves simplified, slight increase in
	performance.

    * update/downdate performance improved.

    * ordering options and output statistics added to MATLAB/cholmod
	mexFunction.

July 27, 2006, version 1.1.1

    * bug fix for cholmod_rowfac_mask, for the complex case.  Has no
	effect on MATLAB.

June 27, 2006:

    * trivial changes to nested dissection code, and cholmod_read.c (for
	debugging, and to add explicit typecasts so compilers don't complain).

May, 2006:

    * Added new routines for LPDASA: cholmod_rowfac_mask, cholmod_updown_mask.
	Added cholmod_collapse_septree.  Added nd_oksep, nd_components
	parameters to Common.

Apr 30, 2006: version 1.1

    * added interface to CAMD.  cholmod_nested_dissection can now call
	CCOLAMD, CSYMAMD, and CAMD.  Common->nd_camd usage extended.
	New argument added to nesdis mexFunction.  New cholmod_camd function
	added.  No other changes to CHOLMOD user interface.

    * more careful integer overflow checks.  Added non-user-callable functions
	to add and multiply size_t integers, with overflow checks.

    * added Common->no_workspace_reallocate

    * flop count is now correct for A*A' case (Common->rowfacfl).

Jan 18, 2006: version 1.0.2

    * bug fix: MATLAB interface incorrect for full logical matrices.

    * Tcov tests modified to generate fewer intentional nan's, to make it
	easier to look for errors in BLAS libraries that incorrectly
	generate nan's.

Dec 16, 2005: version 1.0.1

    * bug fix: cholmod_amd allocated too small of a workspace when ordering A*A'

Dec 8, 2005: version 1.0

    * no real changes.  Version 1.0 is the same as version 0.8.  Version 1.0 is
	simply the formal stable release.

    * known issue:  the floating point operation count, Common->rowfacfl, is
	statistic is incorrect when factorizing A*A'.  This will be fixed in
	version 1.1.

Nov 15, 2005: version 0.8

    * bug fix in t_cholmod_super_numeric, for [R,p]=chol(A) usage.

    * Common->quick_return_if_not_posdef added.

    * Added cholmod_row_lsubtree (required for LPDASA)

    * bug fix: cholmod_rcond returned sqrt(1/cond) for an LL' factorization;
	1/cond is required.

    * new statistics added: flop counts for cholmod_rowfac, # of factor column
	reallocations, # of factor reallocations due to column reallocations,
	and # of times the (non-default) bounds on diag(L) are hit.

    * factor column reallocation skipped if space already big enough.

    * bug fix: cholmod_copy_factor did not copy L->is_monotonic.

    * bug fix: cholmod_change_factor (diagonal entry was wrong in one case)

    * rcond added to cholmod mexFunction ([x,rcond] = cholmod(A,b)).

    * cholmod_rowadd, cholmod_rowdel modified.  rowdel no longer removes
	entries from the matrix; it sets them to zero instead.

Oct 10, 2005: version 0.7

    * minor changes:  minor change to Check/cholmod_check.c (coerce
	sizeof(...) to (int) when printing. Less strict check on A->p for
	unpacked matrices) , removed a few unused variables in
	Check/cholmod_read.c and Demo/cholmod*demo.c, changed "exit(0)" to
	"return(0)" in Demo/cholmod_simple.c.  Changed Makefile so that "." is
	not assumed to be on the $path.  Added Cygwin to architecture detection
	in Include/cholmod_blas.h.  Added cparent and cmember to nesdis.m.
	Space for future expansion added to cholmod_common.

    * removed "rowmark" from the Modify module, which affects how partial
	updates to Lx=b solves are done during update/downdate.  Should only
	affect LPDASA.

    * added CHOLMOD_SUBSUB_VERSION

Aug 31, 2005:  version 0.6 released.
