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User:Jon Awbrey/SCRATCHPAD
(view source)
Revision as of 04:34, 27 January 2009
176 bytes added
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04:34, 27 January 2009
→Proof Schemata
Line 935:
Line 935:
<br>
<br>
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<pre>
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Rule 4
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If X c U is fixed
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and u C U is varied,
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then the following are equivalent:
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R4a. u C X.
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R4b. [u C X].
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R4c. [u C X](u).
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R4d. {X}(u).
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R4e. {X}(u) = 1.
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</pre>
Jon Awbrey
12,080
edits