11 ideas
9987 | An aggregate in which order does not matter I call a 'set' [Bolzano] |
17884 | Mathematical set theory has many plausible stopping points, such as finitism, and predicativism [Koellner] |
17893 | 'Reflection principles' say the whole truth about sets can't be captured [Koellner] |
21222 | Logicians presuppose a world, and ignore logic/world connections, so their logic is impure [Husserl, by Velarde-Mayol] |
21223 | Phenomenology grounds logic in subjective experience [Husserl, by Velarde-Mayol] |
17894 | We have no argument to show a statement is absolutely undecidable [Koellner] |
10856 | A truly infinite quantity does not need to be a variable [Bolzano] |
17890 | There are at least eleven types of large cardinal, of increasing logical strength [Koellner] |
21224 | Pure mathematics is the relations between all possible objects, and is thus formal ontology [Husserl, by Velarde-Mayol] |
17887 | PA is consistent as far as we can accept, and we expand axioms to overcome limitations [Koellner] |
17891 | Arithmetical undecidability is always settled at the next stage up [Koellner] |