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Apr 23 |
answered | Does every locally compact Hausdorff space admit a locally finite open covering by relatively compact sets? |
Apr 21 |
awarded | Yearling |
Apr 12 |
comment |
Segments on a family of parallel lines
Also on math.SE. |
Mar 2 |
comment |
Question about of comeager set
Cross-posted from math.SE. |
May 21 |
answered | Properties of open covers |
Mar 10 |
awarded | Commentator |
Oct 17 |
awarded | Informed |
Oct 14 |
awarded | Autobiographer |
Oct 9 |
awarded | Quorum |
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awarded | Constituent |
Oct 1 |
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Sep 19 |
comment |
A problem on infinite dimensional metric space
As a math.SE moderator I have closed the math.SE version of this question. It this is deemed inappropriate for MO, leave a comment to me on the math.SE question of this question and I/we can re-open it there. |
Jun 25 |
awarded | Yearling |
May 12 |
awarded | Fanatic |
Mar 14 |
comment |
Bijective-equivalent collections of proper classes in set theory
What sort of axiomatization are you thinking of for NBG/MK? I think the most common axiomatizations include (or imply) Limitation of Size, which says that a class is proper iff it admits an injection from V, and from which you then get Global Choice. |
Feb 20 |
comment |
How to see such space is Lindelof?
@John: Do you mean my characterisation of the open subsets of $\mathbb{R}_B$? (Which follows from the fact that the topology generated by the usual open subsets of $\mathbb{R}$ and the singletons from $B$.) Or that there is a countable $I_0$? (Which follows from the fact that $\mathbb{R}$ is second-countable, and thus hereditary Lindelöf.) |
Feb 20 |
answered | How to see such space is Lindelof? |
Jan 23 |
awarded | Critic |
Jan 11 |
awarded | Popular Question |
Oct 9 |
answered | Existence of weakly compact cardinals |