#16986: Enhance rational_preimages and all_rational_preimages to work over
Number
Fields
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Reporter: jdefaria | Owner:
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.4
Component: algebraic | Resolution:
geometry | Merged in:
Keywords: | Reviewers: Ben Hutz
Authors: Joao de Faria | Work issues:
Report Upstream: N/A | Commit:
Branch: | 928941e6a3df966c89ae97c7bf0250bd049e264c
u/jdefaria/ticket/16986 | Stopgaps:
Dependencies: |
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Changes (by bhutz):
* status: needs_review => needs_work
Comment:
Actually, this example is not fixed
{{{
P.<x,y>=ProjectiveSpace(CC,1)
H=End(P)
f=H([x^2-2*y^2,y^2])
f.rational_preimages(P([0,1]))
}}}
but the other one is.
Also some minor things:
- Both docstrings still says requires QQ and endomorphism of projective
space. Neither are still true.
- There are two lines with terminating white space 2519, 2550.
- Coordinates is spelled wrong on 2604.
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Ticket URL: <http://trac.sagemath.org/ticket/16986#comment:16>
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