GAP Package HAP

This package provides some functions for group cohomology and algebraic topology.

The current version of this package is version 1.75, released on 2026-03-24. For more information, please refer to the package manual. There is also a README file.

Dependencies

This package requires GAP version >= 4.12

The following other GAP packages are needed:

• polycyclic >=1.1
• crystcat >=1.1
• fga >=1.1
• aclib >=1.1
• nq >=1.1
• SmallGrp >=1.1
• Polymaking >=0.8.4

The following additional GAP packages are not required, but suggested:

• homology >=0.0
• edim >=1.2.2
• singular >=06.07.23
• congruence >=0,0
• HAPcryst >=0.1.0
• xmod >0.0
• laguna >0.0

Author

Graham Ellis.

Citing

Please, cite this package as

[Ell26] Ellis, G., HAP, Homological Algebra Programming, Version 1.75 (2026)
(GAP package), https://gap-packages.github.io/hap.

You can get more info by typing Cite("HAP"); in the gap prompt.

Copy BibTeX to clipboard

Feedback

For bug reports, feature requests and suggestions, please use the issue tracker.