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The Development of Modern Logic$
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Leila Haaparanta

Print publication date: 2009

Print ISBN-13: 9780195137316

Published to Oxford Scholarship Online: September 2009

DOI: 10.1093/acprof:oso/9780195137316.001.0001

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Gottlob Frege and the Interplay between Logic and Mathematics

Gottlob Frege and the Interplay between Logic and Mathematics

(p.196) 5 Gottlob Frege and the Interplay between Logic and Mathematics
The Development of Modern Logic

Christian Thiel

Oxford University Press

This chapter explores Gottlob Frege's contribution to logic. Frege has been called the greatest logician since Aristotle, but he failed to gain influence on the mathematical community of his time and the depth and pioneering character of his work was acknowledged only after the collapse of his logicist program due to the Zermelo–Russell antinomy in 1902. Frege, by proving his theorem χ without recourse to Wertverläufe, exhibited an inconsistency (or at least an incoherence) in the traditional notion of the extension of a concept. He prompted our awareness of a situation the future analyses of which will hopefully not only deepen our systematic control of the interplay of concepts and their extensions but also improve our understanding of the historical development of the notion of “extension of a concept” and its historiographical assessment.

Keywords:   Gottlob Frege, mathematical logic, Zermelo–Russell antinomy, extension

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