Re: why does professor david c ullrich have to put people down to

On Dec 18, 4:20 am, lwal...@xxxxxxxxx wrote:
On Dec 17, 8:27 am, Mariano Suárez-Alvarez

<mariano.suarezalva...@xxxxxxxxx> wrote:
On Dec 17, 2:44 am, lwal...@xxxxxxxxx wrote:
I _want_ to explore the set size Winter calls s(S). But
it's everyone else who tells me that it's wrong.
Do you want your size to be invariant under
bijections?

Not bijections between sets and their proper subsets.

Some bijections are acceptable of course, as long as
they do not imply that a set has the same size as
any of its proper subsets. My challenge is to figure
out which bijections are acceptable.

So the size of a set will depend on the nature of its
elements?

-- m
.

Loading