Mathematical Logic Carnap R Meaning and Necessity. A Study in Semantics and Mo

I.THEMETHODOFEXTENSIONANDINTENSIONi 1.PreliminaryExplanations2 2.L-Concepts7 3.EquivalenceandL-Equivalence13 4.ClassesandProperties16 5.ExtensionsandIntensions23 6.ExtensionsandIntensionsofSentences25 7.IndividualDescriptions32 8.Frege'sMethodforDescriptions35 9