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sav08:extending_languages_of_decidable_theories [2008/04/15 14:26] vkuncak |
sav08:extending_languages_of_decidable_theories [2008/04/15 14:27] vkuncak |
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**Proof:** | **Proof:** | ||
+ | How to define $L'$? | ||
++++| | ++++| | ||
Fix an ordering on the set $V$ of all first-order variables. If $G$ is a term, formula, or a set of formulas, let $fv(G)$ denote the ordered list of its free variables. | Fix an ordering on the set $V$ of all first-order variables. If $G$ is a term, formula, or a set of formulas, let $fv(G)$ denote the ordered list of its free variables. |