#18700: Group algebras should have a coercion inherited from coercions of the
underlying groups
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Reporter: tscrim | Owner: sage-combinat
Type: enhancement | Status: new
Priority: major | Milestone: sage-6.8
Component: coercion | Keywords: group algebras
Merged in: | Authors: Travis Scrimshaw
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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Consider the following situation:
{{{
sage: P = RootSystem(['A',2,1]).weight_lattice()
sage: W = RootSystem(['A',2,1]).weight_space()
sage: W.has_coerce_map_from(P)
True
sage: PA = P.algebra(QQ)
sage: WA = W.algebra(QQ)
sage: WA.has_coerce_map_from(PA)
False
}}}
The last line should be `True`.
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Ticket URL: <http://trac.sagemath.org/ticket/18700>
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