Cardinal of all well-orders of $\mathbb{N}$
121860
Number of well-ordering relations on a well-orderable infinite set $A$?
140868
Axiomatization of $\mathbb{Z}$ via well-ordering of positives.
41783
Cardinality of the Cartesian Product of Two Equinumerous Infinite Sets
106325
Question about Cardinality
120522
Showing any countable, dense, linear ordering is isomorphic to a subset of $\mathbb{Q}$
52861
Natural Numbers and Well ordering
13924
For all infinite cardinals $\kappa, \ (\kappa \times \kappa, <_{cw}) \cong (\kappa, \in).$
91281
Proving the so-called "Well Ordering Principle"
62687
Proving Cardinality of Cosets in Abstract Algebra
14972
Cardinality of Vitali sets: countably or uncountably infinite?
15733
Show that the cardinality of $\mathbb N$ is the same as the cardinality of $\mathbb N \times \mathbb N$
30587
Uncountable well ordered set in $Z^-$ theory.
118390
Symbol for the cardinality of the continuum
35972
Well ordering principle for rationals
30519
"Real" cardinality, say, $\aleph_\pi$?
140662
Powers of infinite cardinals in the generic extension
10839
Problem in Cardinality and Order