Re: The seven step series

From: Bruno Marchal <marchal.domain.name.hidden>
Date: Tue, 1 Sep 2009 13:24:43 +0200

Hi Mirek,


On 01 Sep 2009, at 12:25, Mirek Dobsicek wrote:


> I am puzzled by one thing. Is the Axiom of dependent choice (DC)
> assumed
> implicitly somewhere here or is it obvious that there is no need for
> it
> (so far)?

I don't see where I would have use it, and I don't think I will use
it. Cantor's theorem can be done in ZF without any form of choice
axioms. I think.

Well, I may use the (full) axiom of choice by assuming that all
cardinals are comparable, but I don't think I will use this above some
illustrations.

If you suspect I am using it, don't hesitate to tell me. But so far I
don't think I have use it.

Bruno



http://iridia.ulb.ac.be/~marchal/




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Received on Tue Sep 01 2009 - 13:24:43 PDT

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