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Löb's theorem. In DICTIOUS you will not only get to know all the dictionary meanings for the word
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English
Etymology
Named after Martin Löb, who formulated it in 1955.
Proper noun
Löb's theorem
- (logic) A theorem stating that, in any formal system F with Peano arithmetic, for any formula P, if it is provable in F that "if P is provable in F then P is true", then P is provable in F.