/******************************************************************************
 * Copyright (c) 1998 Lawrence Livermore National Security, LLC and other
 * HYPRE Project Developers. See the top-level COPYRIGHT file for details.
 *
 * SPDX-License-Identifier: (Apache-2.0 OR MIT)
 ******************************************************************************/

***********************************************************************
* This file records the changes made to this directory                */
***********************************************************************
 
02/07/01    Version 1.5.0R1
02/13/01    version 1.5.0R2 
            - modify the matrixLoadComplete function to output matrix
              to a file even when it has been previously assembled
              (per Tim Dunn's request)
02/15/01    version 1.5.0R3 
            - correct an error in MPI_Allreduce in buildSchurRHS.
            - take out a duplicate destroy(f1) in buildSchurRHS
            - in matrixLoadComplete, change to print original matrix
            - fix the SuperLU nrows for Schur reduced systems
            - in BuildSchurReducedRHS, set currX and currB
            - in BuildSchurReducedRHS, multiply ddata instead of divide
02/20/01    still version 1.5.0R3
            - fix memory leaks with reusing selectedList_
            - change isis option to hypre in cfei-hypre.h
02/21/01    still version 1.5.0R4
            - major debug for minResProjection, interface change also
02/22/01    version 1.5.0R5
            - add in debug versions of A-Conjugate and MinRes projections
            - change Schur reduction to look for Schur rows from top
02/23/01    still version 1.5.0R5
            - debug Schur reduction when a pressure BC is imposed (not SPD)
02/26/01    still version 1.5.0R5
            - fix a bug in buildRHS (multiply inv(M) instead of divide)
            - fix the printMat option (print HYb_ instead of currB_) in
              matrixLoadComplete
02/28/01    version 2.0.0R6
            - remove extra zeros in rows that at BC's
03/06/01    version 1.5.0R6 and 2.0.0R6
            - fix a bug in buildReducedRHS (ProcNRows)
04/10/01    2.0.0R7
            - fix a bug in BC handling (reset values, not take out columns)
            - optimize by taking out zeros in loading matrix to parcsr
            - revert Schur complement reduction to old ways 
04/12/01    - convert totally to 2.0 
04/24/01    2.0.0R8
            - add Euclid preconditioner
            - create an amgDebug flag for boomeramg diagnostics
04/25/01    2.0.0R8
            - make preconditioner reuse more usable
            - make A-conjugate projection restart instead of truncation
04/26/01    2.0.0R9
            - split HYPRE_LinSysCore.C into 2 files and shorten subroutines
            - add system AMG
05/02/01    2.0.0R9
            - take out iostream.h because it creates problem on solaris
05/10/01    2.0.0R10
            - re-work launchSolver parameter setting for preconditioners.
            - add diagnostic information to SuperLUX
06/14/01    2.0.0R11
            - re-work hypre_slide_reduce.C to give smaller subroutines
            - output matrices to file in longer precision
06/25/01    2.0.1R1
            - change to the new IJ interface
            - add timings for non-MPI version
07/17/01    2.0.1R2
            - improve the projection methods 
            - add amgMaxIter 
07/19/01    2.0.1R3
            - fix a bug in the lower and upper bounds of MatrixCreate
            - fix problems with the projection methods 
07/30/01    2.0.1R4
            - this should couple with the bug fix in the new IJMatrix
            - include automatically SuperLU
            - a few more changes to new IJMatrix/Vectors in SuperLU/AMGe
              part of the code
09/14/01    2.0.1R5
            - get rid of the HYPRE_LSI_Sort function
            - add identity preconditioner
            - add incompressible flow block preconditioners
09/21/01    2.0.1R6
            - add Symmetric QMR
10/17/01    2.0.1R7
            - add flexible GMRES
            - fix SuperLU problems for HP machines
10/25/01    2.0.1R8
            - major reorganization of the block preconditioning module
12/05/01    2.0.1R9
            - fix several memory leaks
12/19/01    2.0.1R10
            - add links to MLI
01/02/02    2.0.1R11
            - add functions to get element matrices from FEI
            - renovate the parameters function
            - get rid of FEGridInfo module.
01/08/02    2.0.1R12
            - add functions to directly transfer element information from FEI
            - fix a bug in mli_fedata.C
03/18/02    2.0.1R13
            - debug the schurReduction version 2
            - update with respect to FEI 2.x.12
03/26/02    2.0.1R14
            - optimize the matrix loading phase
            - get rid of the old matrix stuff
04/26/02    2.0.1R15
            - add new slide reduction capability 
05/17/02    2.0.1R16
            - add Uzawa algorithm 
            - debug/improve slide reduction capability
            - debug problems on blue (abs function)
05/30/02    2.0.1R17
            - add distribute SuperLU (not working yet)
            - problem probably in DSuperLU
07/02/02    2.0.1R18
            - add hybrid CG diag/AMG solver
            - fix ddilut problems
            - take out MLI compiler complaints
07/26/02    2.0.1R19
            - improve on MLI's SGS and BSGS smoothers 
            - add LSICG 
            - consolidate setupPrecon and correct a few include problems
09/18/02    2.0.0R20
            - take out iostream.h again because it creates problem on solaris
            - improve slideReduction for intersecting slide surfaces
            - fix resetInitialGuess for Schur reduction
            - take out diagnostic messages in SuperLU
10/22/02    2.0.0R21
            - fix a bug in HYPRE_SlideReduction.C
            - implement null space correction in slide reduction
            - incorporate LOBPCG for null space correction
            - take out the last iostream.h from fei-base
            - major revision of femli
10/30/02    2.0.0R22
            - add normal equation approach
            - fix a few memory leaks in SuperLU
            - change Pweight default to 0.0
            - add ESSL to block smoothers
11/21/02    2.0.0R23
            - add material coarsening
            - add polynomial null vectors
11/27/02    2.0.0R24
            - add nonsymmetric AMG
            - correct bug in matrix_mult : put diag in front
            - add better matrix transpose function
12/03/02    2.0.0R25
            - add variable tolerance for block preconditioning
            - fix autotest bug (unused variables) in mli_method_amgrs.C
12/18/02    2.0.0R26
            - add Kaczmarz smoother
            - correct a bug in mli_solver_gs.C
12/19/02    2.5.0R1
            - change major revision number to reflect use of fei-2.5.0
            - fix a bug with fgmres variable preconditioning
            - change normal equation to construct it in launch stage
            - put null detection in gmres
01/08/03    2.5.0R2
            - take out strings.h include file from fei-hypre and femli
            - move HYPRE_LSI_Uzawa.h to HYPRE_LSI_Uzawa_c.h to avoid
              compile problems on Microsoft windows.
            - fix SGS problem with relaxation parameter
            - add diagnostics (print rnorm) tool to SGS
            - add window option for strcasecmp in fei-hypre and femli
01/14/03    2.5.0R3
            - add scale matrix function (not done yet)
            - fix nodal coordinate passing
            - mli works now even local_nrows =0 for some processors
            - amgrs not work perfectly since matrixTranspose not working
              right.
            - add diagnostics to SGS smoother
            - change mli test driver to run nonsymmetric problems.
04/29/03    2.5.1R1
            - modify putIntoSystemMatrix to support fei-lite
            - add a few more diagnostics messages (per Kull's problem)
06/09/03    2.5.1R2
            - correct an error with gmres (convergence check)
08/21/03    2.5.1R3
            - put in an additional fe class for multiple domain per proc
            - take out compiler warnings
            - take out a few memory leaks
09/12/03    2.5.1R4
            - put in ARPACK and eigenvector nullspace for aggregation
            - add scalar variable to aggregation
            - change error threshold for QR
            - add amgMaxLevels 
09/19/03    2.5.2R1
            - add slide reduction option 4 to handle ALE3D's constraint
              problems
            - clean up a little bit for HYPRE_SlideReduction
10/30/03    2.5.2R2
            - add compatible relaxation to femli/amgrs
            - clean up some compiler complaints
11/07/03    2.5.2R3
            - clean up a lot compiler complaints
            - improve on the AMGSAe capabilities.
11/18/03    2.5.2R4
            - clean up a few compiler complaints
            - a few adjustments for mli
            - re-do the outputlevel stuff
11/19/03    2.5.3R1
            - fix the vendor blas/lapack problem in superlu
12/04/03    2.5.4R1
            - change the blas/lapack problem in superlu one more time
            - add gmres smoother
            - add one more coarsening in AMGSA
12/17/03    2.5.4R2
            - add a few more options in HYPRE_LSI_mli.cxx
            - perfect the global coarsening in AMGSA
            - smooth vector AMGSA capability by Edmond
04/21/04    2.5.4R3
            - take out MPI functions from FEI_HYPRE_Impl.cxx
            - take out MPI reference from FEI_HYPRE_include.h
            - add Edmond's smooth vector capabilites via the FEI
            - MLI now default (HYPRE_LinSycCore.cxx, HYPRE_LSC_aux.cxx, etc.)
04/27/04    2.5.5R1
            - correct autotest complaints
            - add new fei implementation
07/01/04    2.5.5R2
            - separate superlu and blas and lapack from HYPRE_LSI
            - better amgsa coarsening
            - deal with lsame and xerbla multiply defined problems
07/31/04    2.5.5R3
            - add error flag return to satisfy Al Nichols' need
              (include changes to krylov, fei-hypre, and ParaSails)
10/11/04    2.6.1R1
            - change semantics for with-blas and with-lapack
            - add domain decomposition algorithm, mli smoothing
            - add tolerance for arpack
11/30/04    2.6.2R1
            - add hybrid SA/GSA preconditioner to CG and GMRES
            - major revision to configure/makefile
            - add up to 24 null space vector to AMGSA
03/30/06    2.7.1R1
            - add ML Maxwell 
            - to use: turn on define in HYPRE_MLMaxwell.h, compile hypre 
                      and ml, copy libml.a to hypre/lib, copy ml_maxwell.cxx
                      to test directory, modify Makefile in test directory
                      to compile ml_maxwell.cxx (link with ml), and run
                      with Gradient and EdgeStiff files (first line nnz,
                      number of rows, number of columns, then entries with
                      0-based.)

