Le 22-nov.-07, à 07:19, Barry Brent a écrit :
>
> The reason it isn't a bijection (of a denumerable set with the set of
> binary sequences): the pre-image (the left side of your map) isn't
> a set--you've imposed an ordering. Sets, qua sets, don't have
> orderings. Orderings are extra. (I'm
The reason it isn't a bijection (of a denumerable set with the set of
binary sequences): the pre-image (the left side of your map) isn't
a set--you've imposed an ordering. Sets, qua sets, don't have
orderings. Orderings are extra. (I'm not a specialist on this stuff
but I think Bruno,
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