#17982: Ambient space root poset is broken
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Reporter: nathanwilliams | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: sage-6.6
Component: combinatorics | Resolution:
Keywords: root poset, | Merged in:
days64 | Reviewers: Nicolas M. Thiéry
Authors: Nathan Williams | Work issues:
Report Upstream: N/A | Commit:
Branch: public/17982 | c1c9fd5f1d9863852075aa79022c0e7e812ad28c
Dependencies: | Stopgaps:
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Description changed by nathanwilliams:
Old description:
> The ambient space for the root system of type A causes a bug in the
> method root_poset(). In particular, the following code causes an error.
>
> sage: RootSystem(['A', 2]).ambient_space().root_poset()
> Error in lines 2-2
> KeyError: 3
>
> I fixed this bug by redefining the dimension to be the number of simple
> roots.
New description:
The ambient space for the root system of type A causes a bug in the method
root_poset(). In particular, the following code causes an error.
sage: RootSystem(['A', 2]).ambient_space().root_poset()
Error in lines 2-2
KeyError: 3
I fixed this bug by redefining the dimension to be the number of simple
roots. "I" also fixed some formatting conventions.
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Ticket URL: <http://trac.sagemath.org/ticket/17982#comment:5>
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