From 6686cfa5d5563732dcf036b3b2335eacf26d210c Mon Sep 17 00:00:00 2001 From: Moniker1998 Date: Thu, 25 Dec 2025 03:58:46 +0100 Subject: [PATCH 1/2] new theorem --- theorems/T000806.md | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 theorems/T000806.md diff --git a/theorems/T000806.md b/theorems/T000806.md new file mode 100644 index 000000000..f79a6ac26 --- /dev/null +++ b/theorems/T000806.md @@ -0,0 +1,16 @@ +--- +uid: T000806 +if: + and: + - P000019: true + - P000131: true +then: + P000020: true +refs: + - zb: "1126.54010" + name: When is a compact space sequentially compact? (O. Alas, R. Wilson) +--- + +Established as corollary 2.2 in {{zb:1126.54010}}. + +In fact, theorem 2.1 shows slightly more generally that if $hL(X) < \mathfrak{t}$ and $X$ is countably compact, then $X$ is sequentially compact. Here $hL(X)$ is the hereditary Lindelof number and $\mathfrak{t}$ is the tower number, where $\omega_1\leq \mathfrak{t}\leq \mathfrak{c}$. From eae46ba53ff82da1c72c8aee0e45e82026d50992 Mon Sep 17 00:00:00 2001 From: Moniker1998 Date: Fri, 26 Dec 2025 14:30:02 +0100 Subject: [PATCH 2/2] compromising --- theorems/T000806.md | 2 -- 1 file changed, 2 deletions(-) diff --git a/theorems/T000806.md b/theorems/T000806.md index f79a6ac26..619fcadb5 100644 --- a/theorems/T000806.md +++ b/theorems/T000806.md @@ -12,5 +12,3 @@ refs: --- Established as corollary 2.2 in {{zb:1126.54010}}. - -In fact, theorem 2.1 shows slightly more generally that if $hL(X) < \mathfrak{t}$ and $X$ is countably compact, then $X$ is sequentially compact. Here $hL(X)$ is the hereditary Lindelof number and $\mathfrak{t}$ is the tower number, where $\omega_1\leq \mathfrak{t}\leq \mathfrak{c}$.