On Tue, Aug 3, 2010 at 2:29 PM, William Stein <wst...@gmail.com> wrote:
> +1    It makes no sense for < to mean "subset" because < should be a
> total order.
>
> If you want to check for subsets we should use a method like in python:
>
> sage: a = set([1,2,3])
> sage: b = set([2,3,4])
> sage: a.issubset(b)
> False
> sage: b.issubset(a)
> False
> sage: a.issubset(b.union(a))
> True
>
> I don't like "issubset" as the method name, and would prefer
> "is_subset", personally.

http://trac.sagemath.org/sage_trac/ticket/9677

needs a review...

-- 
Robert L. Miller
http://www.rlmiller.org/

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