Analysis of information sources in references of the Wikipedia article "Frege's theorem" in English language version.
Frege's startling discovery, of which he may or may not have been fully aware and which has been lost to view since the discovery of Russell's paradox, was that arithmetic can be derived in a purely logical system like that of his Begriffsschrift from this consistent principle and from it alone.
Frege's startling discovery, of which he may or may not have been fully aware and which has been lost to view since the discovery of Russell's paradox, was that arithmetic can be derived in a purely logical system like that of his Begriffsschrift from this consistent principle and from it alone.