5 ideas
21548 | The null class is the class with all the non-existents as its members [MacColl, by Lackey] |
10304 | Very few things in set theory remain valid in intuitionist mathematics [Bernays] |
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] |
1556 | By nature people are close to one another, but culture drives them apart [Hippias] |