#8506: Inefficient hash for homsets
-------------------------------+--------------------------------------------
Reporter: robertwb | Owner: cremona
Type: defect | Status: needs_work
Priority: major | Milestone: sage-4.3.4
Component: elliptic curves | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
-------------------------------+--------------------------------------------
Changes (by cremona):
* status: needs_review => needs_work
Comment:
I am not competent to comment on the hashing issues. But I applied the
patch to 4.3.4.alpha1 and had the following test failures (I only tested
sage/schemes/elliptic_curves, and without -long):
{{{
sage -t sage/schemes/elliptic_curves/heegner.py
**********************************************************************
File
"/storage/jec/sage-4.3.4.alpha1/devel/sage-8505/sage/schemes/elliptic_curves/heegner.py",
line 2588:
sage: hash(y)
Expected:
-5236815264926108755
Got:
-756867903203770682
**********************************************************************
File
"/storage/jec/sage-4.3.4.alpha1/devel/sage-8505/sage/schemes/elliptic_curves/heegner.py",
line 2893:
sage: hash(EllipticCurve('389a').heegner_point(-7,5))
Expected:
-5236815264926108755
Got:
-756867903203770682
**********************************************************************
2 items had failures:
1 of 4 in __main__.example_107
1 of 3 in __main__.example_121
***Test Failed*** 2 failures.
For whitespace errors, see the file
/home/jec/.sage//tmp/.doctest_heegner.py
[83.6 s]
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8506#comment:5>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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