Le 14-nov.-07, à 17:23, Torgny Tholerus a écrit :
Bruno Marchal skrev:
0) Bijections
Definition: A and B have same cardinality (size, number of elements)
when there is a bijection from A to B.
Now, at first sight, we could think that all *infinite* sets have the
same cardinality,
Bruno Marchal skrev:
Le 14-nov.-07, 17:23, Torgny Tholerus a crit :
What do you mean by "..."?
Are you asking this as a student who does not understand the math, or
as a philospher who, like an ultrafinist, does not believe in the
potential infinite (accepted by
Hi,
Le Thursday 15 November 2007 14:45:24 Torgny Tholerus, vous avez écrit :
Bruno Marchal skrev:
Le 14-nov.-07, à 17:23, Torgny Tholerus a écrit :
What do you mean by each x here?
I mean for each natural number.
What do you mean by each in the sentence for each natural number? How
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