Wellformed formula wff encyclopedia of computer science. More information about well formed formulas can be found here. The semantics of a logic associate each formula with a meaning. The w s consist of the least set of strings such that. A formula is a syntactic object that can be given a semantic meaning by means of an interpretation. A grammatical expression is called a wellformed formula wff. The problem of testing whether a string is in the language must be decidable see undecidable problems. A formal language can be identified with the set of formulas in the language. The zfc axiom of extension conveys the idea that, as in naive set theory, a set is determined solely by its members.
Well formed formulae wff pdf download well formed formulae wff pdf read online other articles where wellformed formula is discussed. Wff demonstration, well formed formula in propositional. Give a related but different kind of reasoning with a different outcome. In mathematical logic, propositional logic and predicate logic, a wellformed formula, abbreviated wff or wff, often simply formula, is a finite sequence of symbols from a given alphabet that is part of a formal language. A wellformed formula wff is a string of symbols that is grammatically syntactically correct by virtue of belonging to some language of interest. Formulate the advertising reasoning as a wff and use the form to see the true situation. Two key uses of formulas are in propositional logic and predicate logic. What symbols can i use, and how do i put them in the box. Read the propositional logic page to learn more about the algorithm used on the html form above.
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