#17101: Sparse vector creation may discard non-zero entries
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Reporter: cheuberg | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.4
Component: linear | Keywords: sparse vector, real interval
algebra | field
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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Current erroneous behaviour:
{{{
sage: v = vector([RIF(-1, 1)], sparse=True)
sage: v.is_zero()
True
sage: v
(0)
}}}
The reason is the check {{{x[i] != 0}}} in {{{__init__}}}:
{{{
sage: RIF(-1, 1) != 0
False
sage: RIF(-1, 1) == 0
False
sage: bool(RIF(-1, 1))
True
sage: bool(RIF(0, 0))
False
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/17101>
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