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1 change: 1 addition & 0 deletions properties/P000010.md
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Expand Up @@ -14,6 +14,7 @@ Defined in 14E of {{zb:1052.54001}}.
----
### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary with respect to open sets.
- This property is not hereditary with respect to closed sets
(Example: {S11|P10}
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1 change: 1 addition & 0 deletions properties/P000014.md
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Expand Up @@ -22,4 +22,5 @@ Defined on page 11 of {{zb:0386.54001}} (as $T_5$).
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary.
1 change: 1 addition & 0 deletions properties/P000015.md
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Expand Up @@ -31,4 +31,5 @@ Defined on page 16 of {{zb:0386.54001}} (as perfectly $T_4$).
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary (see Theorem 2.1.6 in {{zb:0684.54001}}).
5 changes: 5 additions & 0 deletions properties/P000017.md
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Expand Up @@ -9,3 +9,8 @@ refs:
A space which is the union of countably many {P16} subsets.

Defined on page 19 of {{zb:0386.54001}}.

----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
1 change: 1 addition & 0 deletions properties/P000019.md
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Expand Up @@ -19,4 +19,5 @@ Defined on page 19 of {{zb:0386.54001}}. See for example {{wikipedia:Countably_
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary with respect to closed sets.
1 change: 1 addition & 0 deletions properties/P000020.md
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Expand Up @@ -15,5 +15,6 @@ Defined on page 19 of {{zb:0386.54001}}.
---
### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary with respect to closed sets.
- This property is preserved by countable products (see Theorem 3.10.35 in {{zb:0684.54001}}).
1 change: 1 addition & 0 deletions properties/P000022.md
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Expand Up @@ -13,4 +13,5 @@ Defined on page 20 of {{zb:0386.54001}}.
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is preserved in any coarser topology.
5 changes: 5 additions & 0 deletions properties/P000024.md
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Expand Up @@ -16,3 +16,8 @@ Equivalently (see Condition 2 of {{wikipedia:Locally_compact_space}}), every poi
a closed and compact neighborhood.

Defined on page 20 of {{zb:0386.54001}} as "strongly locally compact". Contrast with {P130}.

----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
5 changes: 5 additions & 0 deletions properties/P000025.md
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Expand Up @@ -22,3 +22,8 @@ Equivalently, $X=\bigcup_{n<\omega}K_n$ for $K_n$ compact, and such that $K_n\su
The equivalences above can be shown using the ideas in {{mathse:4568032}}.

Defined on page 21 of {{zb:0386.54001}} as "$\sigma$-locally compact".

----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
1 change: 1 addition & 0 deletions properties/P000027.md
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Expand Up @@ -13,4 +13,5 @@ Defined on page 7 of {{zb:0386.54001}}.
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary.
5 changes: 5 additions & 0 deletions properties/P000029.md
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Expand Up @@ -17,3 +17,8 @@ A space in which every collection of pairwise-disjoint nonempty open sets is cou

Defined on page 22 of {{zb:0386.54001}}.
Also referred to as the "Suslin/Souslin property" as in e.g. 1.7.12 of {{zb:0684.54001}}.

----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
1 change: 1 addition & 0 deletions properties/P000031.md
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Expand Up @@ -18,4 +18,5 @@ Defined on page 23 of {{zb:0386.54001}}.
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary with respect to closed sets.
1 change: 1 addition & 0 deletions properties/P000032.md
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Expand Up @@ -13,4 +13,5 @@ Defined on page 23 of {{zb:0386.54001}}.
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary with respect to closed sets.
5 changes: 5 additions & 0 deletions properties/P000034.md
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Expand Up @@ -35,3 +35,8 @@ Also see [Henno Brandsma: On paracompactness, full normality and the like](http:

(Note: {{zb:0386.54001}} defines this property on page 23 as "fully $T_4$".
Misleadingly, it also calls "star refinement" what all other major sources call a barycentric refinement.)

----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
1 change: 1 addition & 0 deletions properties/P000039.md
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Expand Up @@ -24,6 +24,7 @@ See {{wikipedia:Hyperconnected_space}} for other equivalent characterizations.
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary with respect to open sets.
- This property is preserved by arbitrary products.
- This property is preserved by continuous images.
5 changes: 5 additions & 0 deletions properties/P000040.md
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Expand Up @@ -14,3 +14,8 @@ Equivalently ({{mathse:5006424}}), the only neighborhood of the space's
diagonal $\Delta=\{\langle x,x\rangle:x\in X\}$ is $X^2$.

Defined on page 29 of {{zb:0386.54001}}.

----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
1 change: 1 addition & 0 deletions properties/P000041.md
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Expand Up @@ -32,4 +32,5 @@ Defined on page 30 of {{zb:0386.54001}}.
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary with respect to open sets.
1 change: 1 addition & 0 deletions properties/P000042.md
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Expand Up @@ -44,4 +44,5 @@ Compare with {P43} and {P96}.
----
### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary with respect to open sets.
1 change: 1 addition & 0 deletions properties/P000049.md
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Expand Up @@ -26,6 +26,7 @@ which we do not assume here.
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary with respect to open sets (see Problem 15G.2 in {{zb:1052.54001}}).
- This property is hereditary with respect to dense sets (see {{mathse:3769214}}).
- This property is hereditary with respect to locally dense sets (equivalent to previous two meta-properties; see also Proposition 1 of {{mathse:5025114}}).
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1 change: 1 addition & 0 deletions properties/P000050.md
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Expand Up @@ -13,5 +13,6 @@ Defined on page 33 of {{zb:0386.54001}}.
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary.
- This property is preserved by arbitrary products.
1 change: 1 addition & 0 deletions properties/P000054.md
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Expand Up @@ -15,5 +15,6 @@ Defined on page 37 of {{zb:0386.54001}}.
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary.
- This property is preserved by arbitrary disjoint unions.
1 change: 1 addition & 0 deletions properties/P000056.md
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Expand Up @@ -17,4 +17,5 @@ Defined on page 7 of {{zb:0386.54001}}.
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is preserved by arbitrary disjoint unions.
5 changes: 5 additions & 0 deletions properties/P000060.md
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Expand Up @@ -13,3 +13,8 @@ refs:
Every continuous function $f:X \to \mathbb R$ is constant.

Defined on page 223 of {{zb:0386.54001}}.

----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
1 change: 1 addition & 0 deletions properties/P000062.md
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Expand Up @@ -11,6 +11,7 @@ Every open cover of $X$ has a countable subcollection whose union is dense in $X
----
### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary with respect to clopen sets.
- This property is preserved in any coarser topology.
- If a nonempty product space satisfies the property, so does every factor.
5 changes: 5 additions & 0 deletions properties/P000064.md
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Expand Up @@ -11,3 +11,8 @@ refs:
A space such that the countable union of closed nowhere dense subsets has empty interior; equivalently, such that the countable intersection of open dense subsets is still dense.

See {{wikipedia:Baire_space}} for several other equivalent characterizations.

----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
1 change: 1 addition & 0 deletions properties/P000066.md
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Expand Up @@ -16,4 +16,5 @@ See section 5 of {{doi:10.1016/0166-8641(95)00067-4}}.
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary with respect to closed sets.
1 change: 1 addition & 0 deletions properties/P000068.md
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Expand Up @@ -17,4 +17,5 @@ See section 6 of {{doi:10.1016/0166-8641(95)00067-4}}.

#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary with respect to closed subspaces.
7 changes: 6 additions & 1 deletion properties/P000069.md
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Expand Up @@ -20,4 +20,9 @@ Strategic Menger: The second player has a winning strategy in the Menger game. S

Strategically $\Omega$-Menger: The second player has a winning strategy in the game $\mathsf{G}_{\mathrm{fin}}(\Omega_X,\Omega_X)$. See pages 2 and 3 of {{doi:10.1016/j.topol.2019.07.008}} for more details.

The equivalence of Strategic Menger and Strategically $\Omega$-Menger is Theorem 35 of {{doi:10.1016/j.topol.2019.02.062}}.
The equivalence of Strategic Menger and Strategically $\Omega$-Menger is Theorem 35 of {{doi:10.1016/j.topol.2019.02.062}}.

----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
7 changes: 6 additions & 1 deletion properties/P000070.md
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Expand Up @@ -17,4 +17,9 @@ Markov Menger: The second player has a Markov winning strategy in the Menger gam

Markov $\Omega$-Menger: The second player has a Markov winning strategy in the game $\mathsf{G}_{\mathrm{fin}}(\Omega_X,\Omega_X)$ (relying on only the round number and most recent move of the opponent). See pages 2 and 3 of {{doi:10.1016/j.topol.2019.07.008}} for more details.

The equivalence of Markov Menger with Markov $\Omega$-Menger is established in {{mathse:4730419}}.
The equivalence of Markov Menger with Markov $\Omega$-Menger is established in {{mathse:4730419}}.

----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
1 change: 1 addition & 0 deletions properties/P000079.md
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Expand Up @@ -17,6 +17,7 @@ Equivalently, for every set $A\subseteq X$ that is *not* closed in $X$, there is
----
### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary with respect to closed sets (see {{mathse:479808}}).
- This property is hereditary with respect to open sets (see {{mathse:479808}}).
- This property is preserved by quotient maps.
1 change: 1 addition & 0 deletions properties/P000080.md
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Expand Up @@ -17,5 +17,6 @@ Compare with {P172}.
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary.

1 change: 1 addition & 0 deletions properties/P000090.md
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Expand Up @@ -27,6 +27,7 @@ See also {{zb:0944.54018}}.
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary.
- This property is preserved by arbitrary disjoint unions.
- This property is preserved by finite products.
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5 changes: 5 additions & 0 deletions properties/P000098.md
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Expand Up @@ -22,3 +22,8 @@ its intersection with each $K_n$ is closed (resp. open) in $K_n$.
Defined as "$k_\omega$-space" on page 13 of {{zb:0288.22006}}.
The corresponding notion requiring that each $K_n$ be {P3} is {P92}.
See also {P140}, {P141}, and {P142}.

----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
1 change: 1 addition & 0 deletions properties/P000105.md
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Expand Up @@ -13,4 +13,5 @@ Defined on page 200 of {{zb:1059.54001}}.
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is preserved by arbitrary disjoint unions.
1 change: 1 addition & 0 deletions properties/P000108.md
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Expand Up @@ -24,5 +24,6 @@ For the equivalence of the conditions above, see {{mathse:4737011}}.
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary.
- This property is preserved by arbitrary disjoint unions.
1 change: 1 addition & 0 deletions properties/P000117.md
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Expand Up @@ -15,4 +15,5 @@ See for example page 127 of {{zb:0684.54001}}.
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary.
7 changes: 6 additions & 1 deletion properties/P000128.md
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Expand Up @@ -8,4 +8,9 @@ refs:

Every open $k$-cover of $X$ has a countable $k$-subcover. (A family $\mathcal U$ of open subsets of $X$ is called a *$k$-cover* if each compact subset of $X$ is contained in an element of $\mathcal U$ and $X \notin \mathcal U$.)

Defined on page 3279 of {{doi:10.1016/j.topol.2005.07.015}}.
Defined on page 3279 of {{doi:10.1016/j.topol.2005.07.015}}.

----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
1 change: 1 addition & 0 deletions properties/P000129.md
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Expand Up @@ -15,4 +15,5 @@ See 3.2d of {{zb:1052.54001}}.
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary.
1 change: 1 addition & 0 deletions properties/P000130.md
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Expand Up @@ -12,6 +12,7 @@ Given as condition (3) in {{wikipedia:Locally_compact_space}}. See also the art
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary with respect to open sets.
- This property is hereditary with respect to closed sets.
- This property is hereditary with respect to locally closed sets (equivalent to previous two meta-properties).
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1 change: 1 addition & 0 deletions properties/P000140.md
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Expand Up @@ -22,6 +22,7 @@ Equivalently, a space whose topology coincides with the final topology with resp
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary with respect to closed sets.
- This property is not hereditary with respect to open sets
(e.g., {S23}, open in {S165}).
1 change: 1 addition & 0 deletions properties/P000146.md
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Expand Up @@ -21,4 +21,5 @@ The equivalence between the two definitions is shown in Lemma 1.3 and Corollary
----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is preserved by arbitrary disjoint unions.
1 change: 1 addition & 0 deletions properties/P000149.md
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Expand Up @@ -26,4 +26,5 @@ as the fifth item "$\varepsilon$" in a list from
---
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
- This property is hereditary with respect to closed sets.
5 changes: 5 additions & 0 deletions properties/P000150.md
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Expand Up @@ -12,3 +12,8 @@ The space satisfies the selection principle $\mathsf S_1(\Omega,\Omega)$: for ev
Equivalently, every finite power of $X$ is {P68}.

See {{doi:10.1090/S0002-9939-1988-0964873-0}}; the equivalence with every finite power being {P68} is on page 918.

----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
5 changes: 5 additions & 0 deletions properties/P000152.md
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Expand Up @@ -21,3 +21,8 @@ Equivalent conditions:
- Topologically countable: There is a set $\{ x_n : n \in \omega \} \subseteq X$ so that, for every $x \in X$, there is some $n \in \omega$ so that every neighborhood of $x_n$ contains $x$. See {{zb:1555.54009}} for more on this property.

The equivalence is shown in Theorem 4.17 of {{zb:1555.54009}} and also at {{mathse:4737285}}.

----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
5 changes: 5 additions & 0 deletions properties/P000153.md
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Expand Up @@ -12,3 +12,8 @@ The space satisfies the selection principle $\mathsf S_{\mathrm{fin}}(\Omega,\Om
Equivalently, every finite power of $X$ is {P66}.

See {{doi:10.1016/S0166-8641(96)00075-2}}; the equivalence with every finite power being {P66} is Theorem 3.9.

----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
5 changes: 5 additions & 0 deletions properties/P000156.md
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Expand Up @@ -8,3 +8,8 @@ refs:

The space satisfies the selection principle $\mathsf S_1(\mathcal K,\mathcal K)$: for every sequence $\langle \mathscr U_n : n \in \omega \rangle$ of $k$-covers of $X$, there exist choices $U_n \in \mathscr U_n$ so that $\{ U_n :n \in \omega \}$ is a $k$-cover of $X$.
(A family $\mathcal U$ of open subsets of $X$ is called a *$k$-cover* if each compact subset of $X$ is contained in an element of $\mathcal U$ and $X \notin \mathcal U$.)

----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
5 changes: 5 additions & 0 deletions properties/P000157.md
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Expand Up @@ -6,3 +6,8 @@ refs:
name: Selection games and the Vietoris space
---
The second player has a winning strategy in the game $\mathsf{G}_1(\mathcal K_X,\mathcal K_X)$. See Remark 2.4 and Definition 2.7 of {{doi:10.1016/j.topol.2021.107772}} for more details.

----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
5 changes: 5 additions & 0 deletions properties/P000159.md
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Expand Up @@ -8,3 +8,8 @@ refs:

The space satisfies the selection principle $\mathsf S_{\mathrm{fin}}(\mathcal K,\mathcal K)$: for every sequence $\langle \mathscr U_n : n \in \omega \rangle$ of $k$-covers of $X$, there exist choices $\mathcal F_n$, a finite subset of $\mathscr U_n$, so that $\bigcup_{n\in\omega} \mathcal F_n$ is a $k$-cover of $X$.
(A family $\mathcal U$ of open subsets of $X$ is called a *$k$-cover* if each compact subset of $X$ is contained in an element of $\mathcal U$ and $X \notin \mathcal U$.)

----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
5 changes: 5 additions & 0 deletions properties/P000160.md
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Expand Up @@ -6,3 +6,8 @@ refs:
name: Selection games and the Vietoris space
---
The second player has a winning strategy in the game $\mathsf{G}_{\mathrm{fin}}(\mathcal K_X,\mathcal K_X)$. See Remark 2.4 and Definition 2.7 of {{doi:10.1016/j.topol.2021.107772}} for more details.

----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
7 changes: 6 additions & 1 deletion properties/P000161.md
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Expand Up @@ -5,4 +5,9 @@ refs:
- doi: 10.1016/j.topol.2021.107772
name: Selection games and the Vietoris space
---
The second player has a Markov winning strategy in the game $\mathsf{G}_{\mathrm{fin}}(\mathcal K_X,\mathcal K_X)$ (relying on only the round number and most recent move of the opponent). See Remark 2.4 and Definition 2.7 of {{doi:10.1016/j.topol.2021.107772}} for more details.
The second player has a Markov winning strategy in the game $\mathsf{G}_{\mathrm{fin}}(\mathcal K_X,\mathcal K_X)$ (relying on only the round number and most recent move of the opponent). See Remark 2.4 and Definition 2.7 of {{doi:10.1016/j.topol.2021.107772}} for more details.

----
#### Meta-properties

- $X$ satisfies this property iff its Kolmogorov quotient $\text{Kol}(X)$ does.
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