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![[parent]](http://images.planetmath.org:8080/images/uparrow.png) Viewing Message
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| ``a post for entry "ordinal number"''
by mathforever on 2004-11-19 09:16:55 |
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| I don't really understand the definition:
x = {z \in S | z < x}
as it is written the set on right side DOESN'T contain x at all, so how it could be that it is equal to x? |
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