Gottlob Frege

Gottlob Frege
Gottlob Frege
	Frege c. 1879
Born	Friedrich Ludwig Gottlob Frege; 8 November 1848; Wismar, Grand Duchy of Mecklenburg-Schwerin, German Confederation
Died	26 July 1925 (aged 76); Bad Kleinen, Free State of Mecklenburg-Schwerin, Weimar Germany
Spouse	Margarete Lieseberg (m. 1887; died 1904)
Children	3
Education
Education	University of Göttingen (PhD, 1873); University of Jena (Dr. phil. hab., 1874)
Theses	On a Geometrical Representation of Imaginary Forms in a Plane (1873); Methods of Calculation based on an Extension of the Concept of Magnitude (1874);
Doctoral advisor	Ernst Christian Julius Schering (PhD advisor)
Other advisors	Ernst Abbe; Alfred Clebsch; Kuno Fischer; Hermann Lotze; Eduard Riecke; Wilhelm Eduard Weber
Philosophical work
Era	19th-/20th-century philosophy
Region	Western philosophy
School	Analytic philosophy; Linguistic turn; Logical realism; Modern Platonism; Logicism; Transcendental idealism (before 1891); Metaphysical realism (after 1891); Foundationalism; Indirect realism; Redundancy theory of truth
Institutions	University of Jena
Notable students	Rudolf Carnap
Main interests	Philosophy of mathematics, mathematical logic, philosophy of language
Notable works	Begriffsschrift (1879); The Foundations of Arithmetic (1884); Basic Laws of Arithmetic (1893–1903)
Notable ideas	Analytic philosophy; Ancestral relation; Anti-psychologism; Basic law V; Concept and object; Concept horse paradox; Context principle; Currying; Descriptivist theory of names; Frege's principle; Frege's puzzles; Frege's theorem; Fregean analysis of definite descriptions; Frege–Church ontology; Frege–Geach problem; Frege–Russell logic; Analysis of concepts as a special kind of function; Law of trichotomy; Logicism; Hume's principle; Mediated reference theory; Naive set theory; Named set theory; Predicate calculus; Propositional calculus; Principle of compositionality; Quantification theory; Redundancy theory of truth; Round square copula; Second-order logic; Sense and reference; Set-theoretic definition of natural numbers; Sortal; Third realm ;

Friedrich Ludwig Gottlob Frege (/ˈfreɪɡə/; German: [ˈɡɔtloːp ˈfreːɡə]; 8 November 1848 – 26 July 1925) was a German philosopher, logician, and mathematician. He was a mathematics professor at the University of Jena, and is understood by many to be the father of analytic philosophy, concentrating on the philosophy of language, logic, and mathematics. Though he was largely ignored during his lifetime, Giuseppe Peano (1858–1932), Bertrand Russell (1872–1970), and, to some extent, Ludwig Wittgenstein (1889–1951) introduced his work to later generations of philosophers. Frege is widely considered to be one of the greatest logicians since Aristotle, and one of the most profound philosophers of mathematics ever.

His contributions include the development of modern logic in the Begriffsschrift and work in the foundations of mathematics. His book the Foundations of Arithmetic is the seminal text of the logicist project, and is cited by Michael Dummett as where to pinpoint the linguistic turn. His philosophical papers "On Sense and Reference" and "The Thought" are also widely cited. The former argues for two different types of meaning and descriptivism. In Foundations and "The Thought", Frege argues for Platonism against psychologism or formalism, concerning numbers and propositions respectively.