#20780: add level parameter to rational_preimages for projective points
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Reporter: bhutz | Owner: bhutz
Type: enhancement | Status: new
Priority: minor | Milestone: sage-7.3
Component: algebraic geometry | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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When working with preimage trees it is usefull to compute more than just
the first preimages of a given point. The ticket is to add a parameter to
rational_preimages() to specify how far back to find preimages. I.e. find
all points Q with `f^k(Q) =P` for specified `k`.
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Ticket URL: <http://trac.sagemath.org/ticket/20780>
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