#11239: Incorrect coercion of polynomials over finite fields
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Reporter: johanbosman | Owner: robertwb
Type: defect | Status: needs_info
Priority: major | Milestone: sage-4.7.2
Component: coercion | Keywords: finite fields, polynomials,
coercion
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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Changes (by dkrenn):
* status: new => needs_info
Comment:
It seems that everything that can be represented as polynomial is
converted in that way. The phenomenon also appears with quotient rings:
{{{
sage: R.<x> = ZZ[]
sage: A.<a> = R.quotient(x^3+2); PA.<s> = A[]
sage: B.<b> = R.quotient(x^5+3); PB.<t> = B[]
sage: f = a*s^3 + a^2*s; f
a*s^3 + a^2*s
sage: PB(f)
b*t^3 + b^2*t
}}}
One way to solve this problem would be to check whether the coefficients
of one polynomial rings can be converted (coerced) to the other...
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11239#comment:3>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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