Timeline for Property Sigma Algebra
Current License: CC BY-SA 3.0
3 events
| when toggle format | what | by | license | comment | |
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| Feb 4, 2012 at 0:52 | comment | added | Joel David Hamkins | Yes, Gerald, I had in mind just the case $\mathbb{R}\times\mathbb{R}$. But for the general case, one can use the same idea with $\Delta\times\mathbb{R}^{n-1}$, which is a closed subset of $\mathbb{R}\times\mathbb{R}^n$, whose complement is therefore in the OP's collection, but the set itself is not for similar reasons to what I say in my answer. | |
| Feb 3, 2012 at 15:15 | comment | added | Gerald Edgar | This is a good idea ... "diagonal" does not quite make sense for $\mathbb R \times \mathbb R^n$, though. | |
| Feb 3, 2012 at 13:36 | history | answered | Joel David Hamkins | CC BY-SA 3.0 |