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Preperiodic points fails over rings #34095

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EnderWannabe opened this issue Jun 28, 2022 · 0 comments · May be fixed by #35998
Open

Preperiodic points fails over rings #34095

EnderWannabe opened this issue Jun 28, 2022 · 0 comments · May be fixed by #35998
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@guojing0
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c: dynamics p: major / 3 t: bug

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@EnderWannabe
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The following call fails:

P.<x,y> = ProjectiveSpace(ZZ, 1)
f = DynamicalSystem_projective([x^2 - y^2, y^2])
f.preperiodic_points(1, 1)

as dimension is called on a subscheme defined over a ring. We fix this error.

CC: @bhutz

Component: dynamics

Author: Alexander Galarraga

Issue created by migration from https://trac.sagemath.org/ticket/34095
@EnderWannabe EnderWannabe added this to the sage-9.7 milestone Jun 28, 2022
@mkoeppe mkoeppe modified the milestones: sage-9.7, sage-9.8 Sep 19, 2022
@mkoeppe mkoeppe removed this from the sage-9.8 milestone Jan 29, 2023
@guojing0 guojing0 added this to the sage-10.1 milestone Jul 28, 2023
@guojing0 guojing0 self-assigned this Jul 28, 2023
@guojing0 guojing0 linked a pull request Jul 28, 2023 that will close this issue
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@mkoeppe mkoeppe modified the milestones: sage-10.1, sage-10.2 Aug 20, 2023
@mkoeppe mkoeppe removed this from the sage-10.2 milestone Oct 23, 2023
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Fix preperiodic_points function over rings guojing0/sage
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@guojing0 @mkoeppe @EnderWannabe