Well-formed formula
For the
New Zealand government policy, see
Working for Families.In
logic, WFF (pronounced "wiff") is an abbreviation for well-formed formula. Given a
formal grammar, a WFF is any string that is generated by that grammar. To say that a string is a WFF with respect to a given formal grammar is equivalent to saying that belongs to the language generated by , i.e. .
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Formule bien formée
Formula ben formata
合式公式
在
逻辑中,WFF是合式公式(well-formed formula)的缩写。给定一个
形式文法,WFF 是这个文法生成的任何字符串。例如,在
命题演算中符号序列 是一个 WFF,因为它在文法上正确。符号序列 不是 WFF,因为它不符合命题演算的文法。在形式逻辑中,
证明是有特定性质的 WFF 序列,而序列中最终的 WFF 就是要证明的。
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well-formed formula: WFF
goed-gestructureerde formule