6 ideas
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] |
13304 | Learned men gain more in one day than others do in a lifetime [Posidonius] |
16745 | No one even knows the nature and properties of a fly - why it has that colour, or so many feet [Bacon,R] |
20820 | Time is an interval of motion, or the measure of speed [Posidonius, by Stobaeus] |