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		,  15:25, 11 September 2010
	
 
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|   | E1d.	(( f , g ))$(u).	:$1b  |   | E1d.	(( f , g ))$(u).	:$1b  | 
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| − | ======Definitions======
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| − | <pre>
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| − | Definition 5
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| − | If	X	c	U,
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| − | then the following are identical propositions:
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| − | D5a.	{X}.
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| − | D5b.	f	:	U -> B
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| − | :	f(u)	=	[u C X], for all u C U.
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|   | </pre>  |   | </pre>  | 
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