File "src/sage/schemes/hyperelliptic_curves/hyperelliptic_finite_field.py",
line 1373, in
sage.schemes.hyperelliptic_curves.hyperelliptic_finite_field.HyperellipticCurve_finite_field.zeta_function
Failed example:
H.zeta_function()
Expected:
(81*x^4 + 72*x^3 + 32*x^2 + 8*x + 1)/(9*x^2 - 10*x + 1)
Got:
(16*x^4 + 8*x^3 + x^2 + 2*x + 1)/(4*x^2 - 5*x + 1)
looks like a Heisenbug to me. These are really different answers.
On Fri, Jun 21, 2019 at 10:10 AM Eric Gourgoulhon
<egourgoul...@gmail.com> wrote:
>
> On Ubuntu 18.04 running on bi-Xeon E5-2623 (8 cores) + 16 GB RAM:
>
> - python2:
>
> - incremental build (from 8.8.rc1, with -j16) completed, with Sphinx
> complaining during the doc build:
> formatargspec() is now deprecated. Please use
> sphinx.util.inspect.Signature instead
>
> - all tests from ptestlong passed
>
> - python3:
>
> - incremental build (from 8.8.rc1, with -j16) completed, with the same
> Sphinx deprecation warning as with python 2.
>
> - tests from ptest-python3 passed, except for 2 doctests
> in src/sage/schemes/hyperelliptic_curves/hyperelliptic_finite_field.py:
>
> sage -t --long --warn-long 51.8
> src/sage/schemes/hyperelliptic_curves/hyperelliptic_finite_field.py
> **********************************************************************
> File "src/sage/schemes/hyperelliptic_curves/hyperelliptic_finite_field.py",
> line 1372, in
> sage.schemes.hyperelliptic_curves.hyperelliptic_finite_field.HyperellipticCurve_finite_field.zeta_function
> Failed example:
> H = HyperellipticCurve(t^5 + a*t)
> Exception raised:
> Traceback (most recent call last):
> File
> "/home/eric/sage/py3/local/lib/python3.7/site-packages/sage/doctest/forker.py",
> line 681, in _run
> self.compile_and_execute(example, compiler, test.globs)
> File
> "/home/eric/sage/py3/local/lib/python3.7/site-packages/sage/doctest/forker.py",
> line 1105, in compile_and_execute
> exec(compiled, globs)
> File "<doctest
> sage.schemes.hyperelliptic_curves.hyperelliptic_finite_field.HyperellipticCurve_finite_field.zeta_function[7]>",
> line 1, in <module>
> H = HyperellipticCurve(t**Integer(5) + a*t)
> File
> "/home/eric/sage/py3/local/lib/python3.7/site-packages/sage/schemes/hyperelliptic_curves/constructor.py",
> line 220, in HyperellipticCurve
> raise ValueError("In characteristic 2, argument h (= %s) must be
> non-zero."%h)
> ValueError: In characteristic 2, argument h (= 0) must be non-zero.
> **********************************************************************
> File "src/sage/schemes/hyperelliptic_curves/hyperelliptic_finite_field.py",
> line 1373, in
> sage.schemes.hyperelliptic_curves.hyperelliptic_finite_field.HyperellipticCurve_finite_field.zeta_function
> Failed example:
> H.zeta_function()
> Expected:
> (81*x^4 + 72*x^3 + 32*x^2 + 8*x + 1)/(9*x^2 - 10*x + 1)
> Got:
> (16*x^4 + 8*x^3 + x^2 + 2*x + 1)/(4*x^2 - 5*x + 1)
> **********************************************************************
> 1 item had failures:
> 2 of 16 in
> sage.schemes.hyperelliptic_curves.hyperelliptic_finite_field.HyperellipticCurve_finite_field.zeta_function
> [373 tests, 2 failures, 61.45 s]
>
> Both doctests are passed when run standalone:
>
> ./sage -t --long --warn-long 51.8
> src/sage/schemes/hyperelliptic_curves/hyperelliptic_finite_field.py
> Running doctests with ID 2019-06-21-11-12-55-4862dc1d.
> Git branch: threejs_vector_field-27932
> Using --optional=build,dochtml,memlimit,mpir,python2,sage
> Doctesting 1 file.
> sage -t --long --warn-long 51.8
> src/sage/schemes/hyperelliptic_curves/hyperelliptic_finite_field.py
> [373 tests, 55.46 s]
> ----------------------------------------------------------------------
> All tests passed!
> ----------------------------------------------------------------------
> Total time for all tests: 55.6 seconds
> cpu time: 55.5 seconds
> cumulative wall time: 55.5 seconds
>
>
> Eric.
>
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