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Use parent function, not method, to convert SR to RBF or CBF #33157

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mezzarobba opened this issue Jan 13, 2022 · 10 comments
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Use parent function, not method, to convert SR to RBF or CBF #33157

mezzarobba opened this issue Jan 13, 2022 · 10 comments
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c: symbolics p: major / 3 t: bug
Milestone
sage-9.6

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@mezzarobba
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Use parent(a) rather than a.parent()
to accommodate floats, ints, etc.

This fixes yet another issue with conversions
from symbolic expression to balls,
reported by Markus Wageringel at #32871.

In Sage 9.5.beta7:

sage: a = acos(float(1/4) * sqrt(int(5)))
sage: CBF(a)
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
...
AttributeError: 'float' object has no attribute 'parent'

With the fix in this ticket:

sage: CBF(acos(float(1/4) * sqrt(int(5))))
[0.97759655064526...]

CC: @slel

Component: symbolics

Author: Marc Mezzarobba

Branch/Commit: a995d14

Reviewer: Dima Pasechnik

Issue created by migration from https://trac.sagemath.org/ticket/33157
@mezzarobba mezzarobba added this to the sage-9.5 milestone Jan 13, 2022
@mezzarobba
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Branch: u/mmezzarobba/33157-SRtoCBF

@mezzarobba
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Commit: a995d14

@mezzarobba
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New commits:

a995d14#33157 fix issue in SR → CBF conversion from #32871

@dimpase
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dimpase commented Jan 13, 2022

comment:2

lgtm, thanks!

@dimpase
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dimpase commented Jan 13, 2022

Reviewer: Dima Pasechnik

@mwageringel
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comment:3

Thank you.

@slel

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@slel slel changed the title Issue with SR → [RC]BF conversion Use parent function, not method, to convert SR to RBF or CBF Jan 25, 2022
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@slel
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slel commented Jan 30, 2022

comment:6

Setting milestone to 9.6 now that 9.5 is out.

@slel slel modified the milestones: sage-9.5, sage-9.6 Jan 30, 2022
@vbraun
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vbraun commented Feb 13, 2022

Changed branch from u/mmezzarobba/33157-SRtoCBF to a995d14

@vbraun vbraun closed this as completed in 98fa6a8 Feb 13, 2022
@mezzarobba mezzarobba mentioned this issue Jan 13, 2022
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c: symbolics p: major / 3 t: bug
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@vbraun @dimpase @slel @mezzarobba @mwageringel