On Thu, Oct 1, 2015 at 8:07 AM, Travis Scrimshaw <tsc...@ucdavis.edu> wrote:
>
>>>
>>> Thanks Volker for writing an e-mail before the clash.
>>>
>>> To my mind, it is a complete nonsense to merge this stopgap in a rc0. We
>>> would have time to fix the hash issues along a development cycle starting
>>> from an early beta. And most of them if not all should be fixed before any
>>> stable release. Having a stopgap on 20 or so objects looks like "do not use
>>> Sage as it is broken".
>>>
>>> That being said, this stopgap is clearly mandatory! The hash is a mess
>>> for most Sage objects.
>>
>>
>> - Even without this string default issue being resolved, the equality hash
>> assumption is false in sage, eg Mod(3,5) == 8.
>>
>> - This issue that you seem massively worried about solving asap has been
>> in sage for 10 years.
>>
>>
>
> Most elements have a canonical (string) representation, and as such, this
> default hash works perfectly fine (and most elements are not mutable).
> Adding in this stopgap could potentially kill Sage if is appears in common
> operations in a *stable* release. I could potentially stomach this in a
> beta0 release, but definitely not for a stable. It's just a molehill.

+1

 - William

>
> Travis
>
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-- 
William (http://wstein.org)

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