Timeline for What are some examples of a mathematical result being counterintuitive?
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
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| Aug 22, 2024 at 2:45 | comment | added | Lucenaposition | $\aleph_0\times\aleph_0$ and $\aleph_0$ have the same cardinality (this is provable in ZF). The statement "For all infinite sets $A$, there is a bijection between $A$ and $A\times A$" is equivalent to the axiom of choice. | |
| Aug 22, 2024 at 2:43 | comment | added | David K | @Lucenaposition Is that true if $A$ is countable? | |
| Aug 22, 2024 at 2:10 | comment | added | Lucenaposition | It is equivalent to the axiom of choice. | |
| May 8, 2012 at 4:07 | history | made wiki | Post Made Community Wiki by J. M. ain't a mathematician | ||
| May 2, 2012 at 17:22 | history | answered | N. S. | CC BY-SA 3.0 |