Clifford

a lightweight package for performing Geometric and Clifford Algebra calculations

To run the package, clone the repository and add the folder to Maxima by executing the commands

filesearchdemo: append (filesearchdemo,["/path/to/folder/$$$.{dem,wxm}"]);

filesearchmaxima: append (filesearchmaxima,["/path/to/folder/$$$.{mac,wxm}"]);

setup_autoload ("clifford.mac", clifford);

Changelog 2.5.5 Date 19 Jan 2025 - changes in scalarpart

2.5.5 Date 19 Nov 2023
- countsymb fix
- dotinvsimp change

2.5.4 Date 9 May 2023
- FV algorithm added
- listofclivars fix
- permsign fix

2.5.3 Date 30 Apr 2022
- fix in lvect
- bladep
- cspan - constructs a vector v spanning a full subspace mv: v & mv =0;

2.5.2 Date 5 Dec 2021
- nclv
- bugfix in dotreverse
- bugfix in bdecompose
- norm
- multtrace moved to climatrep

    2.5.1 Date 16 Jul 2021
- bugfix in clihdual
- bugfix in cinvblade

2.5.0 Date 29 Jan 2021  
- matrix code moved to climatrep
- mingrade

2.4.9 Date 26 Jan 2020  
- change in | and & binding power
- fix in dotsimpc 
- psnorm removed
- lvect
- bugfix in maxgrade

2.4.8 Date 12 Dec 2019
- clidual deprecated
- clihdual -  Hodge dual implementation
- added documentation of Hodge dual computation
- bugfix in bivectors

2.4.7 Date 17 Sept 2019
- bugfix in dual and clidual

2.4.6 Date 1 Sept 2019
- bugfix in operpart
- inprotype='ic computes the Hestenes contraction

2.4.5 Date 20 Feb 2019
- bugfix in operpart

2.4.4 Date 18 May 2018,
- fix in clidual
- fix in dual
- grades function
- countsym depreciation

2.4.3 Date 23 Aug 2017
- bugfixes in map usage
2.4.3 Date 23 Aug 2017
- bugfixes in map usage

2.4.2 Date 17 July 2017
-bugfix in explodeop
- change in oppart
- dotexpand

2.4.1 Date 17 Jun 2017
- simplification of Clifford exponents
- trigsimp inncorporated in cliffsimpall
- solving 

2.4 Date 27  Nov 2016
- new implementation clicoeff
- new implementation clidual
- convenience matrix functions
- added algebraical dual functionality
- fixed regressive product
- added Hestenes product
- added xor function

2.3.4 Date  11 Sept 2016
- fixed bug in inner product 
- change in declarations
- regressive product
-change in dual

2.3.3 Date  28 Aug 2016
 - added automorphism code 

version 2.3.2 Date 30 July 2016
 - bugfix release: regressions in tellsimpafter
 - demos extended

2.3 Date 02 July 2016
- bugfix release
- bugfixes in  clicoeff

2.2 Date 20 June 2016     
- new definitions of inner and outer products 
- changes in cinvolve

2.1 Date 12 May 2016
- refactoring
- linear algebra functionality separated
- matrix representations

2.0 Date 10 Apr 2016
- new definitions of  inner product and  outer product (wrong)
- bug fiix in clicoeff

1.9 Date 16 Feb 2016
- bug fix in simplification
- change in factorby, reflect

1.8 Date 06 Dec 2015
- change of notation to exclude conflicts with itensor-based packages

1.7 Date 18 Nov 2015
- refactoring
- change in grade
- chage in simp rules

1.6 Date 04 Nov 2015
- bugixes oppart
- unit tests

1.5.1 Date 30 Oct 2015
- bugfixes oppart
- unit tests

1.4 Date 22 Aug 2015
- oppart simplified
- unit tests

1.3 Date 11 Jun 2015
- unit tests

1.0 Date 26 Jan 2015
- initial implementation
- GitHub repo created

License

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

Zenodo: http://dx.doi.org/10.5281/zenodo.5628359