New posts in Cardinals

How many compact Hausdorff spaces are there of a given cardinality?

Is the set of aleph numbers countable?

Cardinality of the set of all infinite monotonically decreasing sequences of naturals

Why do we classify infinities in so many symbols and ideas?

Does $\operatorname{card}(X) < \operatorname{card}(Y)$ imply $\operatorname{card}(X^2) < \operatorname{card}(Y^2)$ without choice?

What is the result of a number greater than 2 raised to the power of {Aleph-0}?

Why was $\aleph$ (aleph) chosen for infinities?

What is the largest set for which its set of self bijections is countable?

Taking away infinitely many elements infinitely many times

Is aleph-$0$ a natural number?