Bernard Bolzano

The Reverend
Bernard Bolzano
The Reverend Bernard Bolzano
Born	Bernardus Placidus Johann Nepomuk Bolzano; 5 October 1781; Prague, Kingdom of Bohemia
Died	18 December 1848 (aged 67); Prague, Kingdom of Bohemia
Education	University of Prague; (PhD, 1804)
Era	Modern philosophy 19th-century philosophy;
Region	Western philosophy Czech philosophy; German philosophy;
School	Logical objectivism; Utilitarianism; Classical liberalism
Institutions	University of Prague; (1805–1819)
Thesis	Betrachtungen über einige Gegenstände der Elementargeometrie (Considerations on Some Objects of Elementary Geometry) (1804)
Academic advisors	Franz Josef Gerstner
Notable students	Robert von Zimmermann
Main interests	Logic, epistemology, theology
Notable ideas	Logical objectivism; Bolzano's theorem (the first purely analytic proof of the intermediate value theorem); Bolzano–Weierstrass theorem; (ε, δ)-definition of limit; Least-upper-bound property
Ecclesiastical career
Religion	Christianity
Church	Catholic Church
Ordained	1805

Bernard Bolzano (UK: /bɒlˈtsɑːnoʊ/, US: /boʊltˈsɑː-, boʊlˈzɑː-/; German: [bɔlˈtsaːno]; Italian: [bolˈtsaːno]; born Bernardus Placidus Johann Nepomuk Bolzano; 5 October 1781 – 18 December 1848)^[5] was a Bohemian mathematician, logician, philosopher, theologian and Catholic priest of Italian extraction, also known for his liberal views.

Bolzano wrote in German, his native language.^[6] For the most part, his work came to prominence posthumously.

^ ^a ^b Routledge Encyclopedia of Philosophy (1998): "Ryle, Gilbert (1900-76)."
^ Sandra Lapointe, "Bolzano's Logical Realism", in: Penelope Rush (ed.), The Metaphysics of Logic, Cambridge University Press, 2014, pp. 189–208.
^ Morscher, Edgar. "Bernard Bolzano". In Zalta, Edward N. (ed.). Stanford Encyclopedia of Philosophy.
^ Paul Rusnock, Jan Sebestík, Bernard Bolzano: His Life and Work, Oxford University Press, 2019, p. 33.
^ Chisholm, Hugh, ed. (1911). "Bolzano, Bernhard" . Encyclopædia Britannica (11th ed.). Cambridge University Press.
^ O'Hear, Anthony (1999), German Philosophy Since Kant, Royal Institute of Philosophy Supplements, Royal Institute of Philosophy London, vol. 44, Cambridge University Press, p. 110, ISBN 9780521667821, His native language was German.