Proving infinite subsets
9021
An infinite subset of a countable set is countable
19414
Uncountable subset with uncountable complement, without the Axiom of Choice
104855
Prove that $N \subset Z(G)$
157513
How can I prove that these sets are countable infinite?
147013
Subset of a finite set is finite
51617
What is the proof that the total number of subsets of a set is $2^n$?
100977
Infinite subset with pairwise comprime elements
66301
The cardinality of the set of countably infinite subsets of an infinite set
142583
Subsets of the Cantor set
48278
Inequality about infinite cardinals
81682
Proving the algebraic set corresponding to a polynomial is infinite.
107614
Partitioning an infinite set
131983
Prove that $A \subset B$ if and only if $A \setminus B = \emptyset$
16826
prove that every infinite subset of compact set H has a limit point (Explanation)
62687
Proving Cardinality of Cosets in Abstract Algebra
10472
Is every set a subset?
125411
Infinite set always has a countably infinite subset