#15108: base extend for hyperelliptic curves
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Reporter: mstreng | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-5.12
Component: geometry | Resolution:
Keywords: base extend hyperelliptic | Merged in:
curve | Reviewers:
Authors: Marco Streng | Work issues:
Report Upstream: N/A | Commit:
Branch: | Stopgaps:
Dependencies: |
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Changes (by {'newvalue': u'Marco Streng', 'oldvalue': ''}):
* type: enhancement => defect
* author: => Marco Streng
Old description:
New description:
{{{
sage: R.<x> = QQ[]
sage: H = HyperellipticCurve(x^5+x+1)
sage: E = EllipticCurve([0,0,0,1,1])
sage: E.change_ring(RR)
Elliptic Curve defined by y^2 = x^3 + 1.00000000000000*x +
1.00000000000000 over Real Field with 53 bits of precision
sage: E.base_extend(RR)
Elliptic Curve defined by y^2 = x^3 + 1.00000000000000*x +
1.00000000000000 over Real Field with 53 bits of precision
sage: H.change_ring(RR)
Hyperelliptic Curve over Real Field with 53 bits of precision defined by
y^2 = x^5 + x + 1.00000000000000
sage: H.base_extend(RR)
Closed subscheme of Projective Space of dimension 2 over Real Field with
53 bits of precision defined by:
-x0^5 + x1^2*x2^3 - x0*x2^4 - x2^5
}}}
The last output should be a hyperelliptic curve object too.
Apply [attachment:15108.patch]
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Ticket URL: <http://trac.sagemath.org/ticket/15108#comment:1>
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