Bernard Bolzano, 1781-1848. German thinker who established a philosophical foundation of mathematics based on the theory of classes. A strong influence on Tarski and other 20th century logicians and semanticists.
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Bernard Bolzano: Pedagogue
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A brief paper by Helena Lorenzova, giving an overview of Bolzano's teachings. From the Paideia Project.
International Bernard Bolzano Society
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Association of scholars interested in the works and legacy of Bolzano. Organizational, membership and contact information.