On Tue, Dec 29, 2009 at 3:29 PM, Dr. David Kirkby
<david.kir...@onetel.net> wrote:
> I started to run the Sage 4.3 tests suite on 't2' some time back (It has been
> going about 36 hours now. Perhaps it might finish before 4.3.1 comes out.)
>
> There are a few failures, but these couple just came up, and look rather odd,
> as
> this is only an error in the last decimal place, and so will be subject to
> rounding errors with different floating point processors. They do not really
> seem failures to me.
They are important. Search sage-devel, sage-release, and sage-trac
for numerical noise" for hundreds (?) of examples of how to deal with
such issues. The main point is to change the doctest to
sage: py_exp(float(1))
2.7182818284590...
if by hand we've determined that the mistake is really due to
different floating point conventions.
>
>
> **********************************************************************
> File "/rootpool2/local/kirkby/sage-4.3/devel/sage/sage/symbolic/pynac.pyx",
> line
> 1276:
> sage: py_exp(float(1))
> Expected:
> 2.7182818284590451
> Got:
> 2.7182818284590455
> **********************************************************************
>
>
>
> **********************************************************************
> File
> "/rootpool2/local/kirkby/sage-4.3/devel/sage/sage/symbolic/constants_c.pyx",
> line 195:
> sage: float(e)
> Expected:
> 2.7182818284590451
> Got:
> 2.7182818284590455
> **********************************************************************
>
> --
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--
William Stein
Associate Professor of Mathematics
University of Washington
http://wstein.org
--
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