In the Category of $\mathbf{ Set } $ is "the product of an empty set of sets a one-element set"?
13282
In the category $\mathbf{Set}$ is "the product of an empty set of sets a one-element set"?
71976
Is every element on a set also a set?
74860
Why is the empty set a subset of every set?
90816
Why does the product topology allow proper subsets for only finitely many elements?
40232
What do we mean when we say "Let $x$ be an element of the set $\mathbb{R}$"?
44160
Set theory: difference between belong/contained and includes/subset?
132692
Nonempty set mapped to $\emptyset$ and vice-versa
84460
If a set is $F_\sigma$ and is of first category then it is a countable union of closed nowhere dense sets
17525
Why the interior of $\mathbb{Q}$ in $\mathbb{R}$ is empty?
65549
What is the cartesian product of an empty set of sets?
110677
How is an empty set truly "empty"?
3392
Sum of products of elements of nonempty subsets of A set
32774
Finite Cartesian Product of Countable sets is countable?
33064
Powerset of set with empty sets
152678
I've read that abelian categories can naturally be enriched in $\mathbf{Ab}.$ How does this actually work?
64454
$L^2([0,1])$ is a set of first category in $L^1([0,1])$?
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 $\geq 1\ldots$