Definition of power set uses strict subset
54497
Set Notation - Inclusion and Proper Inclusion
33064
Powerset of set with empty sets
67702
Minimal dense subset
33894
How many chains are there in a finite power set?
52682
Is the power set of the natural numbers countable?
102250
Subset of $C[0,1]$ is nowhere dense
24050
Characterization of the Closure of a Set
99248
The set of strict maximums or strict minimums of an arbitrary function is countable.
144735
Possible cardinality of power sets
36612
Strange set notation (a set as a power of 2)?
153551
Is the null set a subset of every set?
74860
Why is the empty set a subset of every set?
90826
Constructing a subset not in $\mathcal{B}(\mathbb{R})$ explicitly
70143
Mutually exclusive countable subsets of a countable set
94266
The union of powersets is contained in the powerset of union
39226
What's the meaning of a set to the power of another set?
129205
A question about uncountable, dense sets in R