Confusion in understanding why empty set is a subset of every set
36721
Is "The empty set is a subset of any set" a convention?
71976
Is every element on a set also a set?
110677
How is an empty set truly "empty"?
9850
How many ways are there to choose 3 subsets $A,B,C$ of a set $\{1,2,3...n\}$ such that $ A \cap B \cap C = \emptyset $
99480
Why is predicate "all" as in all(SET) true if the SET is empty?
28523
When would the intersection of the empty set mean anything?
97951
Is the void set (∅) a proper subset of every set?
125317
Is this statement "Every element in the empty set is greater than itself." true or its negation is true?
130418
Is ${\{\emptyset,\{\emptyset\},\{\{\emptyset\}\},\{\{\{\emptyset\}\}\},...\}} $ a set?
55995
Why is the supremum of the empty set $-\infty$ and the infimum $\infty$?
110485
Nested sequence of non-empty compact subsets - intersection differs from empty set
110669
Linear span of the empty set
65768
What is the cardinality of the set of the empty set?
125502
Empty set literal?
14512
Why cannot a set be its own element?
1307
Infimum and supremum of the empty set
146098
Number of nonempty subsets of a set with $n$ elements