15896 | Cantor needed Power Set for the reals, but then couldn't count the new collections [Lavine on Cantor] |
10112 | The naturals won't map onto the reals, so there are different sizes of infinity [George/Velleman on Cantor] |
18959 | Sets larger than the continuum should be studied in an 'if-then' spirit [Putnam] |
10483 | Mathematics and science do not require very high orders of infinity [Boolos] |
15909 | 'Aleph-0' is cardinality of the naturals, 'aleph-1' the next cardinal, 'aleph-ω' the ω-th cardinal [Lavine] |