Hey Erik,
   It seems like what you want is # rel tol XYZ or # abs tol XYZ. For an 
example, see rings/real_double.pyx.

Best,
Travis


On Wednesday, August 10, 2016 at 6:38:59 AM UTC-5, Erik Bray wrote:
>
> Hi all, 
>
> Sorry if this has been discussed ad-infinitum before--I looked around 
> a bit but didn't find a definitive answer. 
>
> I have one (well at least one) test that's failing on Cygwin due to 
> tiny difference in the last digit of the result of log(3). 
>
> This leads to to several questions: 
>
> 1) Is it worth investigating the reason for the difference? 
> 2) Is it worth trying to provide a workaround for the difference? 
> 3) Or should the test just be updated to ignore the last couple digits 
> of the result, and if so how (ellipses?) 
>
> Thanks, 
> Erik 
>

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