#12923: Comparison of vectors is O(n) even in the simple cases
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Reporter: hivert | Owner: jason, was
Type: defect | Status: closed
Priority: major | Milestone: sage-5.3
Component: linear algebra | Resolution: fixed
Keywords: vector equality days38 | Merged in: sage-5.3.beta0
Authors: Florent Hivert | Reviewers: Travis Scrimshaw
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by jdemeyer):
In this patch, you added in several places
{{{
#!diff
+ # __hash__ is not properly inherited if comparison is changed
+ def __hash__(self):
+ """
+ TEST::
+
+ sage: w = vector(ZZ, [-1,0,0,0])
+ sage: w.set_immutable()
+ sage: isinstance(hash(w), int)
+ True
+ """
+ return free_module_element.FreeModuleElement.__hash__(self)
}}}
What's the reason for this? Removing these `__hash__` methods doesn't do
any harm.
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Ticket URL: <http://trac.sagemath.org/ticket/12923#comment:9>
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