Friedrich Ludwig Gottlob Frege was a German philosopher, logician, and mathematician. He is understood by many to be the father of analytic philosophy, concentrating on the philosophy of language and mathematics. Though largely ignored during his lifetime, Giuseppe Peano and Bertrand Russell introduced his work to later generations of logicians and philosophers.

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 ("Über Sinn und Bedeutung") and "The Thought" ("Der Gedanke") are widely cited.

• From https://en.wikipedia.org/wiki/Gottlob_Frege, accessed 26 January 2018

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Gottlob Frege, the eminent philosopher and logician. http://plato.stanford.edu/entries/frege/