X-Nico

unusual facts about Bernard Bolzano



Dedekind-infinite set

Although such a definition was known to Bernard Bolzano, he was prevented from publishing his work in any but the most obscure journals by the terms of his political exile from the University of Prague in 1819.

Infinitesimal

In the second half of the nineteenth century, the calculus was reformulated by Augustin-Louis Cauchy, Bernard Bolzano, Karl Weierstrass, Cantor, Dedekind, and others using the (ε, δ)-definition of limit and set theory.

Platonism

This modern Platonism (sometimes rendered "platonism," with a lower-case p, to distinguish it from the ancient schools) has been endorsed in one way or another at one time or another by numerous philosophers (most of whom taking a particular interest in the philosophy and foundations of logic and mathematics), including Bernard Bolzano, Gottlob Frege, Edmund Husserl, Bertrand Russell, Alonzo Church, Kurt Gödel, W.V. Quine, Hilary Putnam, George Bealer and Edward Zalta.


see also