#8414: lattice -> space in weyl_groups.py
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Reporter: bump | Owner: bump
Type: defect | Status: new
Priority: major | Milestone: sage-4.3.4
Component: combinatorics | Keywords:
Author: Daniel Bump | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Description changed by bump:
Old description:
> WeylGroups and WeylGroupElements have a method lattice() and also an
> attribute _lattice. At one time this pointed to the ambient lattice, but
> now it points to the ambient space.
>
> For consistency perhaps the name of the method and attribute should
> therefore be changed to space(). The patch makes this change.
New description:
WeylGroups and WeylGroupElements have a method lattice() and also an
attribute _lattice. At one time this pointed to the ambient lattice, but
now it points to the ambient space.
For consistency perhaps the name of the method and attribute should
therefore be changed to space(). The patch makes this change.
A further change: the reflections() method now has a keys option. This
method returns
a dictionary between the reflections in W and the positive roots.
The default keys="reflections" makes the reflections the keys and the
roots the values. The option
keys="values" interchanges these.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8414#comment:2>
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