Hi David, Hi John,
OK, here is a first try. Let me know if this is too easy, too
difficult, or something in between. The path is not so long, so it is
useful to take time on the very beginning.
I end up with some exercice. I will give the solutions, but please try
to be aware if you can or
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, indeed the cardinality of the infinite set N. By N,
I
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