#5962: Comparison in the Gap interface raises an error
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Reporter: SimonKing | Owner: was
Type: defect | Status: needs_review
Priority: major | Milestone: sage-4.5
Component: interfaces | Keywords: gap comparison
Author: Simon King | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Changes (by newvalueoldvalue):
* status: new => needs_review
* upstream: => N/A
* author: => Simon King
Comment:
I see no way for a really satisfying solution, as long as GAP can not even
compare two objects whose definitions are identical.
However, the errors being raised by GAP when comparing elements are now
caught in a try-except clause. We have, as doc tests:
{{{
sage: gap('DihedralGroup(8)')==gap('DihedralGroup(8)')
False # sorry, this is what GAP claims.
sage: gap('SymmetricGroup(8)')<gap('AlternatingGroup(8)')
True
sage: gap('SymmetricGroup(8)')>gap('AlternatingGroup(8)')
False
sage: gap('SymmetricGroup(8)')==gap('SymmetricGroup(8)')
True
}}}
All but the first of these examples worked before. But the first resulted
in an error, which is now fixed.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5962#comment:1>
Sage <http://www.sagemath.org>
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