What is the cardinality of a set of all finite subsets of $\Bbb{N}$?
41661
Show that the set of all finite subsets of $\mathbb{N}$ is countable.
59459
Binary sequences and ${2}^{\mathbb{N}}$ have the same cardinality
146098
Number of nonempty subsets of a set with $n$ elements
96845
Question: Compare the cardinality between the sets $\Bbb R$ and $\Bbb N^{\Bbb N}$
136306
Let $A$ be a finite set and let $B$ be a subset of $A$ with $|A|=n$,$|B|=m$ and $0<m<n$. Count the subsets of $A$ containing $ B.$
139078
Infinite partition of $\mathbb N$ by infinite subsets
73850
Cardinality of set of functions
81509
The cardinality of a countable union of countable sets, without the axiom of choice
79974
The cardinality of Lebesgue sets
93330
Cardinality of all cardinalities
153072
Guessing a subset of $\{1,...,N\}$
10472
Is every set a subset?
149382
Prove that $(0,1) \subseteq\mathbb R$ and $(4,10) \subseteq\mathbb R$ have the same cardinality.
123847
Cardinality of $GL_n(K)$ when $K$ is finite
272
Cantor Sets/nonempty/cardinality
79568
Cardinality of the set $D$
66301
The cardinality of the set of countably infinite subsets of an infinite set