Do an infinite set and its double have the same cardinality?
55680
The relationship of ${\frak m+m=m}$ to AC
32965
Proving that for infinite $\kappa$, $|[\kappa]^\lambda|=\kappa^\lambda$
151355
Are cardinal numbers well defined? Or could we have something like $\aleph_{1/2}$?
58636
Do the real numbers and the complex numbers have the same cardinality?
79974
The cardinality of Lebesgue sets
158671
Cardinality of a set that consists of all existing cardinalities
156006
Cardinality of set containing all infinite subsets of $\mathbb{Q}$
146560
Is there any uncountably infinite set that does not generate the reals?
95947
Cantor set + Cantor set =$[0,2]$
59459
Binary sequences and ${2}^{\mathbb{N}}$ have the same cardinality
65768
What is the cardinality of the set of the empty set?
109054
Given an infinite set of cardinality $X$, is there a chain in $\mathcal P(X)$ of the same cardinalty of $\mathcal P(X)$?
93330
Cardinality of all cardinalities
104744
Can sets of cardinality $\aleph_1$ have nonzero measure?
157513
How can I prove that these sets are countable infinite?
82947
Undecidable cardinality
86154
Why is this true? A set is Dedekind infinite if and only if equipotent to the union with the set containing itself