4 ideas
17750 | The first clear proof of the consistency of the first order predicate logic was in 1928 [Hilbert/Ackermann, by Walicki] |
9987 | An aggregate in which order does not matter I call a 'set' [Bolzano] |
10856 | A truly infinite quantity does not need to be a variable [Bolzano] |
7903 | The six perfections are giving, morality, patience, vigour, meditation, and wisdom [Nagarjuna] |