#16515: Every RDF number compares equal to float NaN
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Reporter: tcoffee | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.3
Component: coercion | Keywords: RDF RealDoubleField float NaN
Merged in: | equal number
Reviewers: | Authors:
Work issues: | Report Upstream: N/A
Commit: | Branch:
Stopgaps: | Dependencies:
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Any number in !RealDoubleField compares equal to Python's floating-point
NaN (which is not even true of NaN itself):
{{{
sage: nan = float('nan')
sage: RDF(123) == nan
True
sage: nan == nan
False
}}}
This bit me quite easily: I used a Python script that converted a number
to RDF (imported from Sage) to take advantage of a built-in method, did
more calculations with it, and checked if the result was NaN. It always
was.
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Ticket URL: <http://trac.sagemath.org/ticket/16515>
Sage <http://www.sagemath.org>
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