The story
Named after Martin Löb, who formulated it in 1955.
Etymology from Wiktionary, CC BY-SA 4.0.
Löb's theorem
Today it means: 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. Full definition →