#15348: "R.<a> =" syntactic sugar incorrect for EquationOrder and ZZ.extension
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Reporter: emassop | Owner:
Type: defect | Status: new
Priority: minor | Milestone:
Component: number fields | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by bruno):
Is it really the syntactic sugar that poses problem? It seems that
`inject_variables()` is the problem.
{{{
#!python
sage: f = x^2+1
sage: R = ZZ.extension(f,'i')
sage: R.inject_variables()
Defining i
sage: i
1
}}}
The problem seems to come from the fact that `R.variable_names()` is
`('i',)` while `R.gens()` is `[1,i]`, and a `zip` is called on these two
objects, resulting in `[('i',1)]`.
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Ticket URL: <http://trac.sagemath.org/ticket/15348#comment:1>
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