- male, deceased (1945)
- Gerhard Karl Erich Gentzen was a German mathematician and logician. Gentzen was born in Greifswald, Germany. He was one of Hermann Weyl's students...
- male, 73 years old
- Dag Prawitz (born 1936) is a Swedish philosopher and logician. He is best known for his work on proof theory and the foundations of natural deduction.
- male, deceased (1965)
- Stanisław Jaśkowski was a Polish logician who made important contributions to proof theory and semantics. He was a student of Jan Lukasiewicz and a...
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