Bruno von Freytag-Löringhoff

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Bruno Baron von Freytag-Löringhoff (born June 11, 1912 in Bilderlingshof, today Bulduri (district of Jūrmala ), near Riga ; † February 28, 1996 in Tübingen ) was a German philosopher and mathematician.

Life

After attending lectures in mathematics , physics , musicology and philosophy at the Universities of Greifswald and Munich , Freytag received his doctorate in philosophy in Greifswald in 1936 and, after participating in the war, obtained his habilitation in Freiburg im Breisgau in 1944 and in Tübingen in 1947 . From 1955 Freytag-Löringhoff was Professor of Philosophy at the University of Tübingen . In 1957 he reconstructed the first calculating machine from 1623 of the Tübingen astronomy professor Wilhelm Schickard, which had only been handed down in scanty sketches . He also recreated Schickard's slide rules. After his retirement in 1977 Freytag dealt with the structures of the new PCs .

Philosophical work

The question of freedom and chance occupied him all his life. In his main work, Freytag-Löringhoff first turned to the research of a fundamental question in mathematics philosophy about the mode of being of mathematics. His doctoral supervisor, the Greifswald philosopher Günther Jacoby , had conceived the approaches in his "critical ontology ". Jacoby's approach, alongside that of Nicolai Hartmann , has remained decisive for Freytag-Löringhoff's entire philosophizing.

Freytag-Löringhoff's presentation of classical logic in a new symbolic form and the further development of this logic made possible by this go back to Jacoby's suggestions. Freytag's basic philosophical thesis on logic is that the conceptual logic, which goes back to traditional logic, represents the general and basic logic par excellence and that all forms of modern mathematical logic - which he calls "judgment logic" - are merely applications or specializations of what is in this idea the "pure" logic is already mapped out.

Freytag-Löringhoff tried to put his findings into practice in computer programs ("Tübinger Logic", BASIC programs from 1977). The contrast between “logic” and “logistics”, which Jacoby had given, weakened later, especially due to a doctoral thesis by v. Petzinger, who delimited the relationship between conceptual and “judgment logic”.

Fonts

  • The ontological foundations of mathematics. An Inquiry into Mathematical Existence. Niemeyer, Halle 1937.
  • On the mode of being of mathematical objects. In: German Mathematics . Volume 4, ed. Theodor Vahlen , Ludwig Bieberbach , 1939, pp. 238-240.
  • Thoughts on the philosophy of mathematics. Meisenheim / Glan 1948.
  • About the system of modes of syllogism. In: Journal for Philosophical Research. Vol. 4, No. 2, 1949, pp. 235-256.
  • Theses and discussion about philosophical preliminary questions of logistics in a symposium of the Third German Congress for Philosophy in Bremen 1950. In: Congress report Symphilosophein. Lehnen, Munich 1952, pp. 161-203. Modifications made by Arnold Schmidt .
  • Probability, causality and freedom. In: Philosophia naturalis . Volume 2, No. 2, 1952, pp. 35-49.
  • On logic as a doctrine of identity and difference. In: Actes du Xléme Congrés international de Philosophie Bruxelles, 1953. Volume 5, Brussels 1953, pp. 19-24.
  • About the hypothetical judgment and the conclusion on its premises. In: Journal for Philosophical Research. Vol. 9, Issue 1, 1955, pp. 56-76.
  • Logic. Your system and your relationship to logistics. 3rd, revised, edition. Kohlhammer Verlag, Stuttgart 1955.
  • Logic I. The system of pure logic and its relationship to logistics. Kohlhammer, Stuttgart 1955. 5th edition, Stuttgart 1972.
  • Logic II. Definition theory and methodology of calculus change. Stuttgart 1967.
  • About an error by Bolzano and the relationship between the logic of concepts and the logic of judgment. In: Journal for Philosophical Research. Vol. 25, No. 3, 1971, pp. 327-344.
  • New system of logic. Symbolic-symmetrical reconstruction and operative application of the Aristotelian approach. Verlag Felix Meiner, Hamburg 1985, ISBN 3-7873-0636-6 ( online , PDF, 67 MB).
  • Wilhelm Schickard's Tübingen calculating machine from 1623. Edited by Friedrich Seck. 3. Edition. Kulturamt, Tübingen 2002, ISBN 3-910090-48-6 .

Web links


personal data
SURNAME Freytag-Löringhoff, Bruno von
ALTERNATIVE NAMES Freytag-Löringhoff, Bruno Baron von
BRIEF DESCRIPTION German philosopher and mathematician
DATE OF BIRTH June 11, 1912
PLACE OF BIRTH Bilderlingshof near Riga
DATE OF DEATH February 28, 1996
Place of death Tübingen