EntityQ741810· pop 12· linked from 359 articlessignatureSign in to savenotion in mathematical logicConnectionsfirst-order logicEntitysemantic theory of truthEntitymathematical logicEntitypropositional calculusEntityformal systemEntityaleph numberEntityrecursive setEntitylogical constantEntitysemantics of logicEntitystructureEntityground expressionEntitydiagramEntitylogicEntityInternational Standard Book NumberEntityset theoryEntityfunctionEntitysetEntityaxiomEntitytheoremEntityElementsEntityCategoriesMathematical logicModel theoryUniversal algebra