Properties Applicable To Formulas
- A formula A in a language is valid if it is true for every interpretation of .
- A formula A in a language is satisfiable if it is true for some interpretation of .
- A formula A of the language of arithmetic is decidable if it represents a decidable set, i.e. if there is an effective method which, given a substitution of the free variables of A, says that either the resulting instance of A is provable or its negation is.
Read more about this topic: Well-formed Formula
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