On Wednesday, March 26, 2014 5:18:41 PM UTC+4, Amit Saha wrote:
>
> IMO, a product set is a set (at least Wikipedia tells me so). So,
> shouldn't it rather be the following?
>
> {(1,2), (1,3), (2,2), (2,3)}
>
1) It *is* a set:
In [8]: isinstance(p, Set)
Out[8]: True
2) Yes, maybe for FiniteSet - we should evaluate ProductSet.
> Again going by the same idea, I also feel, the len() function should
> return the cardinatlity and not raise a TypeError:
>
Maybe.
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