#20067: Change ring to QQbar fails for subschemes
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Reporter: bhutz | Owner: bhutz
Type: enhancement | Status: needs_review
Priority: minor | Milestone: sage-7.1
Component: algebraic | Resolution:
geometry | Merged in:
Keywords: | Reviewers: Rebecca Lauren
Authors: | Miller, Joseph Eisner
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/bhutz/ticket/20067 | 05e47bbfe1f62431520b6fbb4affb73f9802b710
Dependencies: | Stopgaps:
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Comment (by bhutz):
Not sure exactly what you are suggesting here. If it is just the ability
to supply the mapping, then that is actually the main change here. There
is now an optional `embedding` parameter that can be specified
{{{
Xk=X_change_ring(embedding=k.convert_map_from(QQ))
}}}
The remaining issue was what to do if not specified. In this case, one is
attempted to be constructed (the try/except parts...). When this is not
unique, you seem to be suggesting raising an error and having the user
construct the particular map they want. It seemed more user friendly to me
to simply choose one and provide a warning that happened.
--
Ticket URL: <http://trac.sagemath.org/ticket/20067#comment:11>
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