From 00847bbbffab734333815e4d79ce04a439f149db Mon Sep 17 00:00:00 2001 From: danflapjax <12000932+danflapjax@users.noreply.github.com> Date: Thu, 21 Nov 2024 03:50:40 -0800 Subject: [PATCH 1/4] S44 has P201 --- spaces/S000044/properties/P000086.md | 8 -------- spaces/S000044/properties/P000201.md | 7 +++++++ 2 files changed, 7 insertions(+), 8 deletions(-) delete mode 100644 spaces/S000044/properties/P000086.md create mode 100644 spaces/S000044/properties/P000201.md diff --git a/spaces/S000044/properties/P000086.md b/spaces/S000044/properties/P000086.md deleted file mode 100644 index 2c23509426..0000000000 --- a/spaces/S000044/properties/P000086.md +++ /dev/null @@ -1,8 +0,0 @@ ---- -space: S000044 -property: P000086 -value: false ---- - -$\frac{2}{5}$ belongs to a single closed set $(0,1)$, but -$\frac{3}{5}$ belongs to two closed sets $(0,1)$ and $[1/2,1)$. diff --git a/spaces/S000044/properties/P000201.md b/spaces/S000044/properties/P000201.md new file mode 100644 index 0000000000..bed577615a --- /dev/null +++ b/spaces/S000044/properties/P000201.md @@ -0,0 +1,7 @@ +--- +space: S000044 +property: P000201 +value: true +--- + +$\frac{1}{4}$ lies in every open set. From 41f8d335d1fa5e98b779767bf84b47981826e218 Mon Sep 17 00:00:00 2001 From: Steven Clontz Date: Tue, 26 Nov 2024 19:35:12 -0600 Subject: [PATCH 2/4] add @GeoffreySangston's improvement --- spaces/S000044/properties/P000192.md | 10 ++++++++++ spaces/S000044/properties/P000201.md | 7 ------- 2 files changed, 10 insertions(+), 7 deletions(-) create mode 100644 spaces/S000044/properties/P000192.md delete mode 100644 spaces/S000044/properties/P000201.md diff --git a/spaces/S000044/properties/P000192.md b/spaces/S000044/properties/P000192.md new file mode 100644 index 0000000000..d3f369bcfc --- /dev/null +++ b/spaces/S000044/properties/P000192.md @@ -0,0 +1,10 @@ +--- +space: S000044 +property: P000192 +value: true +--- + +The non-empty closed subsets of {S44} are the closed intervals +$[\frac{n-1}{n}, 1)$, and each is {P201} witnessed by $\frac{n-1}{n}$: the +proper open subsets of $[\frac{n-1}{n}, 1)$ are $[\frac{n-1}{n}, \frac{N-1}{N})$ for $N > n$, +and each contains $\frac{n-1}{n}$. diff --git a/spaces/S000044/properties/P000201.md b/spaces/S000044/properties/P000201.md deleted file mode 100644 index bed577615a..0000000000 --- a/spaces/S000044/properties/P000201.md +++ /dev/null @@ -1,7 +0,0 @@ ---- -space: S000044 -property: P000201 -value: true ---- - -$\frac{1}{4}$ lies in every open set. From 62e76cadcc0b497442f86e2cb3ee4873b3c0e135 Mon Sep 17 00:00:00 2001 From: Steven Clontz Date: Tue, 26 Nov 2024 19:39:12 -0600 Subject: [PATCH 3/4] define quasi-sober using internal references --- properties/P000192.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/properties/P000192.md b/properties/P000192.md index 19921e9af9..b8586af8b7 100644 --- a/properties/P000192.md +++ b/properties/P000192.md @@ -6,8 +6,8 @@ refs: name: Sober spaces and sober sets (Echi & Lazaar) --- -Every nonempty irreducible closed subset of $X$ is the closure of a point of $X$, not necessarily unique; that is, every nonempty irreducible closed subset has at least one *generic point*. -Here, a subset of $X$ is called *irreducible* if it is {P39} with the subspace topology. +Every non-{P137} {P39} closed subspace of $X$ is +{P201}. Equivalently, the Kolmogorov quotient of the space is {P73}. (See {T512}.) From 4d4254d293c62d32895a094477ee92db4242babc Mon Sep 17 00:00:00 2001 From: Steven Clontz Date: Tue, 26 Nov 2024 20:22:02 -0600 Subject: [PATCH 4/4] Update spaces/S000044/properties/P000192.md Co-authored-by: david20000813 --- spaces/S000044/properties/P000192.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/spaces/S000044/properties/P000192.md b/spaces/S000044/properties/P000192.md index d3f369bcfc..f5806e2194 100644 --- a/spaces/S000044/properties/P000192.md +++ b/spaces/S000044/properties/P000192.md @@ -6,5 +6,5 @@ value: true The non-empty closed subsets of {S44} are the closed intervals $[\frac{n-1}{n}, 1)$, and each is {P201} witnessed by $\frac{n-1}{n}$: the -proper open subsets of $[\frac{n-1}{n}, 1)$ are $[\frac{n-1}{n}, \frac{N-1}{N})$ for $N > n$, +nonempty open proper subsets of $[\frac{n-1}{n}, 1)$ are $[\frac{n-1}{n}, \frac{N-1}{N})$ for $N > n$, and each contains $\frac{n-1}{n}$.