New posts in cardinals

Is the sum of all natural numbers countable?

elementary-set-theory cardinals

Do hypercontinuous fields exist?

abstract-algebra field-theory cardinals nonstandard-analysis

Cardinality of algebraic extensions of an infinite field.

abstract-algebra field-theory galois-theory cardinals

Are there non-equivalent cardinal arithmetics?

combinatorics logic set-theory arithmetic cardinals

Cardinality of Vitali sets: countably or uncountably infinite?

measure-theory elementary-set-theory cardinals

Is $2^{\aleph_0} = \aleph_1$?

set-theory examples-counterexamples cardinals

Cardinality of the Set of all finite subset of $\mathbb{R}$

cardinals

List of explicit enumerations of rational numbers [closed]

set-theory cardinals big-list

What is the cardinality of $\Omega$?

elementary-set-theory cardinals ordinals

Fractional cardinalities of sets

set-theory cardinals

What are Aleph numbers intuitively?

set-theory intuition cardinals

Why are infinite cardinals limit ordinals?

elementary-set-theory cardinals ordinals

For every $n < \omega$, $\aleph_n^{\aleph_0} = \max(\aleph_n,\aleph_0^{\aleph_0})$

set-theory cardinals

Is there an axiom of ZFC expressing that GCH fails as badly as possible?

set-theory cardinals

Proof that aleph null is the smallest transfinite number?

set-theory cardinals

Can the cardinality of continuum exceed all aleph numbers in ZF?

set-theory cardinals

How to prove that from "Every infinite cardinal satisfies $a^2=a$" we can prove that $b+c=bc$ for any two infinite cardinals $b,c$?

elementary-set-theory cardinals

Does $\mathcal P ( \mathbb R ) \otimes \mathcal P ( \mathbb R ) = \mathcal P ( \mathbb R \times \mathbb R )$?

measure-theory set-theory cardinals

What is the difference between cardinals and alephs?

set-theory cardinals

What is an example of two sets which cannot be compared?

elementary-set-theory cardinals axiom-of-choice