#7150: Wrong substitution implementation for fraction fields
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Reporter: novoselt | Owner:
Type: defect | Status: needs_review
Priority: critical | Milestone: sage-4.1.2
Component: symbolics | Keywords:
Work_issues: | Author:
Reviewer: | Merged:
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Changes (by fwclarke):
* status: new => needs_review
* milestone: sage-4.1.3 => sage-4.1.2
Comment:
But in 4.1.2.rc0:
{{{
sage: QQ["x", "y"].inject_variables()
Defining x, y
sage: e1 = x^2*y^3 - x^2*y - x*y
sage: e2 = e1.parent().fraction_field()(e1)
sage: print e2
x^2*y^3 - x^2*y - x*y
sage: print e2.subs(y=SR("s"))
s^3*x^2 - s*x^2 - s*x
}}}
So the problem may already have been solved.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7150#comment:1>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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