5 ideas
10304 | Very few things in set theory remain valid in intuitionist mathematics [Bernays] |
13007 | Archimedes defined a straight line as the shortest distance between two points [Archimedes, by Leibniz] |
10303 | Restricted Platonism is just an ideal projection of a domain of thought [Bernays] |
10306 | Mathematical abstraction just goes in a different direction from logic [Bernays] |
20486 | Only liberty, equality and sympathy can stand up to anti-social people [Kropotkin] |