EntityQ204884· pop 9· linked from 15 articlesLöb's theoremSign in to savetheoremConnectionsInternational Standard Book NumberEntitydigital object identifierEntitymathematical logicEntityJSTOROrganizationGödel's incompleteness theoremsEntityCambridge University PressEntityElsevierEntityStanford Encyclopedia of PhilosophyEntitymodal logicEntityQ22908627EntityPeano axiomsEntityformal grammarEntityformal systemEntityRaymond SmullyanEntitymodus ponensEntitycontrapositionEntityPlanetMathEntityCurry's paradoxEntityMartin LöbEntitypropositional variableEntityCategoriesMathematical axiomsMathematical logicMetatheoremsModal logicProvability logicTheorems in the foundations of mathematics