An imagined likeness of Bernard Bolzano, drawn from contemporary accounts and later engravings.
Bernard Bolzano (UK: / b ɒ l ˈ t s ɑː n oʊ /, US: / b oʊ l t ˈ s ɑː -, b oʊ l ˈ z ɑː -/; German: ; Italian: ; born Bernardus Placidus Johann Nepomuk Bolzano; 5 October 1781 – 18 December 1848) was a Bohemian mathematician, logician, philosopher, theologian and Catholic priest of Italian extraction, also known for his liberal views.
“Logical realism Bolzano's theorem (the first purely analytic proof of the intermediate value theorem) Bolzano–Weierstrass theorem (ε” — a single phrase that gathers the spirit of the work.
Principal Contributions
- 01.Logical realism Bolzano's theorem (the first purely analytic proof of the intermediate value theorem) Bolzano–Weierstrass theorem (εA concept central to Bernard's thought.
- 02.δ)-definition of limit Least-upper-bound propertyA concept central to Bernard's thought.