Opened 3 years ago

Closed 3 years ago

#27234 closed defect (fixed)

Implement method `gap` of class `PermutationGroupElement` properly.

Reported by: soehms Owned by:
Priority: major Milestone: sage-8.7
Component: group theory Keywords: libgap, permutation
Cc: Merged in:
Authors: Sebastian Oehms Reviewers: Travis Scrimshaw
Report Upstream: N/A Work issues:
Branch: 0e444c5 (Commits, GitHub, GitLab) Commit: 0e444c5f7aca9c3ac803bb7d8976db9212b9830a
Dependencies: Stopgaps:

Status badges

Description

This is a follow up ticket of #26750. In that ticket the method has been implemented as synonym of _gap_, since at that time libgap produced an error for large permutations. 

┌────────────────────────────────────────────────────────────────────┐
│ SageMath version 8.5, Release Date: 2018-12-22                     │
│ Using Python 2.7.15. Type "help()" for help.                       │
└────────────────────────────────────────────────────────────────────┘
sage: P = PGU(8,2)
sage: p1, p2 = P.gens()
sage: libgap(p1)
python2: libgap.c:184: libgap_get_input: Assertion `strlen(libGAP_stdin_buffer) < length' failed.
Traceback (most recent call last):
...
ValueError: libGAP: Aborted

This error has been fixed in 8.6.beta0. Therefore, we may have gap using libgap, right now!

Change History (5)

comment:1 Changed 3 years ago by soehms

  • Branch set to u/soehms/permgroup_element_gap_meth

comment:2 Changed 3 years ago by soehms

  • Commit set to 0e444c5f7aca9c3ac803bb7d8976db9212b9830a
  • Status changed from new to needs_review

New commits:

​0e444c527234: initial version

comment:3 Changed 3 years ago by tscrim

  • Reviewers set to Travis Scrimshaw
  • Status changed from needs_review to positive_review

LGTM.

comment:4 Changed 3 years ago by soehms

Thanks!

comment:5 Changed 3 years ago by vbraun

  • Branch changed from u/soehms/permgroup_element_gap_meth to 0e444c5f7aca9c3ac803bb7d8976db9212b9830a
  • Resolution set to fixed
  • Status changed from positive_review to closed
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