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] |
13095 | Essence is primitive force, or a law of change [Leibniz] |
1748 | Archelaus was the first person to say that the universe is boundless [Archelaus, by Diog. Laertius] |
2117 | The connection in events enables us to successfully predict the future, so there must be a constant cause [Leibniz] |
5989 | Archelaus said life began in a primeval slime [Archelaus, by Schofield] |