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it should not be possible to set an entry of a vector in a submodule #22075

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videlec opened this issue Dec 19, 2016 · 3 comments
Open

it should not be possible to set an entry of a vector in a submodule #22075

videlec opened this issue Dec 19, 2016 · 3 comments
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c: linear algebra p: major / 3 t: bug

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@videlec
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videlec commented Dec 19, 2016 

sage: V = VectorSpace(QQ, 3)
sage: M = V.subspace([(1,0,0,),(0,1,0)])
sage: v = M()
sage: v
(0, 0, 0)
sage: v[2] = 2 # bug
sage: v
(0, 0, 2)
sage: v.parent()
Vector space of degree 3 and dimension 2 over Rational Field
Basis matrix:
[1 0 0]
[0 1 0]
sage: v in M # bug consequence 1
True
sage: V(v)   # bug consequence 2
(0, 0, 0)

See also:

Component: algebra

Keywords: bug

Issue created by migration from https://trac.sagemath.org/ticket/22075
@videlec videlec added this to the sage-7.5 milestone Dec 19, 2016
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@mkoeppe mkoeppe removed this from the sage-7.5 milestone Dec 29, 2022
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mkoeppe commented Mar 31, 2023

Still unsolved as of 10.0.beta6

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