Re: Bijections (was OM = SIGMA1)

From: Bruno Marchal <>
Date: Wed, 21 Nov 2007 16:48:12 +0100

Le 20-nov.-07, à 17:59, meekerdb a écrit :

> Bruno Marchal wrote:
>> .
>> But infinite ordinals can be different, and still have the same
>> cardinality. I have given examples: You can put an infinity of linear
>> well founded order on the set N = {0, 1, 2, 3, ...}.
> What is the definition of "linear well founded order"? I'm familiar
> with "well ordered", but how is "linear" applied to sets? Just
> curious.

By linear, I was just meaning a non branching order. A tree can be well
founded too, meaning all its branches have a "length" given by an


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Received on Wed Nov 21 2007 - 10:48:25 PST

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