What is the definition of a set in ZFC?
40662
What is the definition of a set?
65768
What is the cardinality of the set of the empty set?
16225
Set-theoretical definition of function evaluation
114968
Partition of a set, definition not clear
73850
Cardinality of set of functions
82487
Define a mathematical set
150692
What's the difference between set and map in C++?
272
Cantor Sets/nonempty/cardinality
87451
Construction of matrices under ZFC axioms
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 $\geq 1\ldots$
102592
Arbitrary Set A a Function??
120712
Is there a way to define the "size" of an infinite set that takes into account "intuitive" differences between sets?
85398
$\mathsf{ZF}$ is not finitely axiomatizable
21392
What is the difference between a class and a set?
115675
Strange consequences of Axiom of Choice in Zermelo set theory
23334
Singular or plural "set"?
858
Is $\{\emptyset\}$ a subset of $\{\{\emptyset\}\}$?