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Merged
prabau merged 3 commits into from
Dec 15, 2024
Merged

Clarify which join is being referenced for S195 #1091

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Clarify which join is being referenced for S195
GeoffreySangston Dec 15, 2024
07da6f9
Forgot name part for Wikipedia
GeoffreySangston Dec 15, 2024
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better links
prabau Dec 15, 2024
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4 changes: 1 addition & 3 deletions spaces/S000195/README.md
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Expand Up @@ -8,6 +8,4 @@ refs:
name: Answer to "Is there a first countable, $T_1$, weakly Lindelof, sequentially compact space which is not also compact?"
---

The set $\omega_1$ whose topology is generated by sets of
the form $\alpha\setminus F=[0,\alpha)\setminus F$ for
$\alpha<\omega_1$ and $F\subseteq\omega_1$ finite.
The set $\omega_1$ with topology equal to the join of the cofinite topology and left ray topology in the [lattice of topologies](https://en.wikipedia.org/wiki/Lattice_of_topologies) on $\omega_1$. This topology is generated by the sets of the form $\alpha\setminus F=[0,\alpha)\setminus F$ for $\alpha<\omega_1$ and $F\subseteq\omega_1$ finite.