6 ideas
9565 | Zermelo made 'set' and 'member' undefined axioms [Zermelo, by Chihara] |
3339 | For Zermelo's set theory the empty set is zero and the successor of each number is its unit set [Zermelo, by Blackburn] |
12695 | Epicurean atomists say body is sensible, to distinguish it from space. [Garber] |
13304 | Learned men gain more in one day than others do in a lifetime [Posidonius] |
12705 | Epicurean atoms are distinguished by their extreme hardness [Garber] |
20820 | Time is an interval of motion, or the measure of speed [Posidonius, by Stobaeus] |