diff --git a/spaces/S000219/README.md b/spaces/S000219/README.md new file mode 100644 index 000000000..bb175d92a --- /dev/null +++ b/spaces/S000219/README.md @@ -0,0 +1,10 @@ +--- +uid: S000219 +name: Discrete space of size $2^{\mathfrak c}$ +refs: + - wikipedia: Discrete_space + name: Discrete space on Wikipedia +--- + +Let $X$ be a set of cardinality $2^{\mathfrak c}$, for example the power set of $\mathbb R$, +and let all subsets of $X$ be open. diff --git a/spaces/S000219/properties/P000052.md b/spaces/S000219/properties/P000052.md new file mode 100644 index 000000000..b98db7cad --- /dev/null +++ b/spaces/S000219/properties/P000052.md @@ -0,0 +1,7 @@ +--- +space: S000219 +property: P000052 +value: true +--- + +By definition. diff --git a/spaces/S000219/properties/P000059.md b/spaces/S000219/properties/P000059.md new file mode 100644 index 000000000..a0c1715b7 --- /dev/null +++ b/spaces/S000219/properties/P000059.md @@ -0,0 +1,7 @@ +--- +space: S000219 +property: P000059 +value: true +--- + +By definition $|X| = 2 ^ \mathfrak{c}$ \ No newline at end of file diff --git a/spaces/S000219/properties/P000163.md b/spaces/S000219/properties/P000163.md new file mode 100644 index 000000000..ddabd7dc0 --- /dev/null +++ b/spaces/S000219/properties/P000163.md @@ -0,0 +1,7 @@ +--- +space: S000219 +property: P000163 +value: false +--- + +By definition $|X| = 2 ^ \mathfrak{c} > \mathfrak{c}$.