Yes, this proof is OK.

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- November 5th 2011, 11:50 PM #1

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## Fol 1

Show that

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We show that any structure for the language and any function that satisfies also satisfies , where denotes a function from the set V of all variables into the universe of . For any , we have and .

It follows that . which in turn implies that .

Is this proof O.K or am I missing something?

Thank you.

- November 6th 2011, 11:17 AM #2

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