about cardinal ，mapping on X
64193
Cardinality of Infinite Symmetric group
111720
Is "have the same cardinality" a equivalence relation?
42794
Prove that functions map countable sets to countable sets
38764
bound on the cardinality of the continuum? I hope not
117047
exponentiation of cardinal number
142631
Show that A has the same cardinality as $A\setminus\{x,y,z\}$
21479
Why cofinality is a cardinal.
89712
For every set $A$, the empty set is a subset of $A$. The empty set is a set. Therefore, the empty set has a cardinality $\geq 1\ldots$
151355
Are cardinal numbers well defined? Or could we have something like $\aleph_{1/2}$?
101993
The cardinality of a language over a set of variables $V$ with $\#V= κ$
121366
Intervals and cardinality
23442
Cardinality of the union of infinite and countable sets
126862
Confused about $x \notin x$ example in Axiom of Specification
69166
Cardinality of $\mathbb{R}$ and $\mathbb{R}^2$
31318
Cardinality of cartesian square
122947
What is the cardinality of the set of infinite cardinalities?
154837
mapping properties of $(1−z)^i$