#18610: Bug: Circular Descent Check in WeylGroups
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Reporter: nathanwilliams | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.8
Component: combinatorics | Resolution:
Keywords: sagedays64.5,coxeter,descent | Merged in:
Authors: Nathan Williams | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by tscrim):
This is because the Weyl group element implements `has_descent`, which is
the standard entry point, and the default implementations do the following
call structure:
{{{
has_descent -> has_left_descent <-> has_right_descent
}}}
since I think most code calls `has_descent` and gives the shortest path
function call path if someone only implements `has_left_descent`. So the
solution would be to explicitly have `has_left_descent(i)` call
`has_descent(i, side='left')`.
--
Ticket URL: <http://trac.sagemath.org/ticket/18610#comment:2>
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