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This file describes changes in the cvec package.
2.8.3 (2025-01-03)
- Fix compilation with GCC 15
- Various janitorial changes
2.8.2 (2024-08-27)
- Require GAP >= 4.12
- Don't attempt to read non-existing files
- Various janitorial changes
2.8.1 (2023-03-28)
- Adjust `CompanionMatrix`, `NewCompanionMatrix` output
to match the GAP documentation (i.e., transpose it compared
to what was returned before)
2.8.0 (2023-03-22)
- Adjust to revised MatrixObj interface in GAP 4.13
- Various janitorial changes
2.7.6 (2022-08-06)
- Fix a bug converting vectors defined over large (non-internal) finite
fields to cvec format
- Various janitorial changes
2.7.5 (2021-09-06)
- Require GAP version >= 4.10
- Replace buildsystem with the "standard GAP package buildsystem"
based on Makefile.gappkg, for quicker and more robust compilation
- Various janitorial changes
2.7.4 (2019-07-17)
- Improve compatibility with upcoming GAP 4.11 (replace uses of
IsRowVectorObj by IsVectorObj, and of BaseField by BaseDomain)
2.7.3 (2019-07-11)
- Rewrote build system to use gac, not autoconf/automake/libtool
- Improve compatibility with upcoming GAP 4.11
- Various janitorial changes
2.7.2 (2019-03-20)
- Removed the (undocumented) Fold and Unfold method
- Clarify the licensing terms again
2.7.1 (2019-02-23)
- Fixed an incompatibility with GAP version >= 4.11
2.7.0 (2019-02-19)
- Require GAP version >= 4.9
- Clarify that license is GPL 2 *or later* (as agreed with Max N.)
- Internal: stop using the GAP kernel variable PolsFF
- Fix error viewing empty semiechelon matrices (patch provided by Frank
Lübeck)
- Fix bug in MinimalPolynomialOfMatrixMC which could lead to an infinite
loop for certain inputs, in particular lower triangular matrices with
multiple eigenvalues (patch provided by Frank Lübeck)
- Add methods to allow access to cmats via `mat[i,j]`
- Various janitorial changes
2.6.1 (2018-06-07)
- Workaround a linker issue with GNU ld 2.30
- Improved build system when using GAP >= 4.9
2.6.0 (2018-03-20)
- Fix crash in CLEANROWKERNEL
- Fix link to issue tracker in manual
- Adapt to changes in GAP's MatrixObj interface (to appear in GAP 4.9)
- Convert README to markdown
- Various other internal fixes and improvements
2.5.7 (2017-08-01)
- Remove CompatibleMatrix method (this *undocumented* API will be
removed in GAP 4.9)
- Fix several broken references in the manual
2.5.6 (2016-11-08)
- Fix a bug reported by Jan De Beule which resulted in cvec incorrectly
converting certain GAP matrices to cvec matrices.
2.5.5 (2016-03-08)
- Maintenance release
2.5.4 (2015-12-18)
- Some functions accept slightly more general input. For example, it
is now in some cases acceptable to use finite field elements like
Z(4)^0 (which is equal, but not identical, to Z(2)^0) as input when
cvec is expecting elements of GF(2).
- Fix EmptySemiEchelonBasis: its documentation said it expects a
sample vector, but the implementation expected a sample matrix. Now
both are possible, and both are documented.
- Fix some errors in the manual.
- Move website to https://gap-packages.github.io/cvec/
- Stop using GenericHashFunc_C (formerly provided by the orb package)
2.5.3 (2014-11-08)
- Tweak the build system to avoid potential issues when the source
code gets repackages by third parties (e.g. by the GAP team, when
creating their big package archives)
2.5.2 (2014-09-24)
- Fix some minor issues in the documentation
- Remove some leftover GAP 4.4 compatibility code
- Update Max Neunhoeffer's contact data
- Use AutoDoc to generate title page of the manual from PackageInfo.g
- Add Max Horn as a maintainer
2.5.1 (2014-04-04)
- Previous release had an invalid release date in
PackageInfo.g (2014-04-31 instead of 2014-03-31).
- Merge HISTORY and CHANGES files.
2.5 (2014-03-31)
- Add methods for \^ for cvecs and Frobenius automorphisms
- Add methods for \^ for cmats and Frobenius automorphisms
- Fix a bug in unpickling semi echelonised bases
- Update and tweak the package build system
- Move package repository and website to GitHub
2.4 (2012-09-14)
- Fix an ELMS_LIST bug for CMats reported by Felix Noeske
2.3 (2012-07-13)
- Fix CMat bug: used to not ShallowCopy its first argument
- Fixed DuplicateFreeList and Filtered bug for CMats.
2.2 (2012-05-28)
- Compile manual against GAP 4.5.4.
- Add script "configure_like_gap".
- Adjust README and installation instructions.
2.1 (2012-02-03)
- Fix a serious bug in MinimalPolynomialMC for matrices over finite
fields. WARNING: Wrong results were produced by version 2.0!
2.0 (2012-01-31)
- Improve implementation of MinimalPolynomialOfMatrixMC and use it
as a method for MinimalPolynomial for row list matrices.
Document it for the first time.
- Completely change build setup to use automake/autoconf/libtool as
done in the IO package.
1.8 (2011-03-24)
- Slightly improved minimal polynomial routine by suggestion of
referee.
- Use C-Hashfunction of orb 3.0 if it is there.
- Many optimisations for GF2
- Faster ScalarProduct for GF2
- Fast EntryOfMatrixProduct for prime fields
- Fixed configure script to work with GAP 4.5 without breaking 4.4.
- Fixed a bug with zero length matrices introduced after 1.7
- Added a Length method for semi echelonised bases
- Documented the Vectors operation for semi echelonised bases
- Put revision 402 as version 1.8 on the web
1.7 (2007-09-26)
- Introduce filters for cmats and cvecs to distinguish cases of q=p
and q <= MAXSIZE_GF_INTERNAL.
- Kernel method for cmat row access
- Operation ScalarProductsRows with kernel method for prime fields
used for condensation
- Fixed infinite recursion in matrix multiplication because of
Winograd method.
- Fixed problem of polynomial factorisation over "DefaultField"
instead of BaseDomain in Minimal and Characteristic polynomial
routines.
- New method for SumIntersectionMat for cmats.
- Use constructors for new objects in new interface, implement them.
- Change all addresses to St Andrews.
- Require GAP >= 4.4.9
- Tune vector matrices interface and polish implementation.
- Added a pickling/unpickling method for semi echelon basis.
- Quite a few little changes to the vector/matrix interface
after discussions in Braunschweig.
- Make TraceMat compatible with GAP4R4.
- Added matobjplist.g* from the dev library for compatibility with 4r4.
- Put revision 324 as version 1.7 on the web.
1.6 (2007-04-02)
- Improve MinimalPolynomialMC, change calling convention.
- Fixed a dangerous bug in matrix multiplication using the
memory-saving Winograd trick.
- Better Value method for CMats (do nothing a human would not also do)
- Put AddMatrix and MultMatrix into interface and implement it for cmats
- Put revision 298 as version 1.6 on the web.
1.5 (2007-02-07)
- Improve usage of grease, in particular for level 1 for 2 < q < 257
- Improve FILL_GREASE_TAB by using trick coming from analysis: we only
have to multiply a few times by the primitive root, not by powers of it.
- Fixed a serious bug in SemiEchelonBasisMutableTX which occurred if
the first row of the matrix was zero.
- New operation CompanionMatrix (not yet documented)
- GreaseCalibration for different machines (not yet documented)
- Winograd trick for multiplication, corresponding calibration function
- Put copyright and licensing information in all files.
- Add version number to archive name, fixed some things in PackageInfo.g.
- Put revision 280 as version 1.5 on the web.
1.4 (2006-11-29)
- Adjust to new buffered I/O.
- New operation ChangeBaseDomain with methods for cvecs and cmats.
- Put revision 212 as version 1.4 on the web.
1.3 (2006-09-01)
- change nearly everything to the new vector/matrix interface
- implement new Intersection functionality no longer using Zassenhaus
- allow for more than one package with a C-part
- added test/polynomials.g to check characteristic and minimal polynomials
- added Memory for cvecs and cmats and to interface
1.2 (2006-08-18)
- ?
1.01 (2006-06-08)
- ?
1.0 (2005-06-28)
- Initial release