#9054: create a class for basic function_field arithmetic for Sage
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Reporter: was
| Owner: was
Type: enhancement
| Status: new
Priority: major
| Milestone: sage-wishlist
Component: algebra
| Resolution:
Keywords:
| Work_issues:
Upstream: N/A
| Reviewer:
Author: William Stein, Robert Bradshaw, Maarten Derickx, Moritz Minzlaff
| Merged:
Dependencies:
|
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Comment(by saraedum):
Entering the following at the sage prompt produces a `TypeError: Unable to
coerce -u^2 (...) to Rational`.
{{{
K.<x> = FunctionField(QQ); R.<y> = K[]
L.<y> = K.extension(y^2 - x)
M.<u> = FunctionField(QQ); R.<v> = M[]
N.<v> = M.extension(v-u^2)
L.hom([u,v])
}}}
This is due to the fact that `hom()` determines the codomain by looking
only at the first element of `[u,v]`.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9054#comment:31>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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