Well Ordering of Sets of Natural Numbers
86926
Why isn't this a well ordering of $\{A\subseteq\mathbb N\mid A\text{ is infinite}\}$?
86914
Cardinality of the set of hyperreal numbers
153072
Guessing a subset of $\{1,...,N\}$
108922
Cardinality and infinite sets: naturals, integers, rationals, bijections
10839
Problem in Cardinality and Order
126569
Can we find a well ordering on an infinite set with no largest element?
43024
Well-ordered sets, properties of an element that is not largest in the set
156660
The set of all strictly increasing sequences of natural numbers
142886
Find set with maximal cardinality given constraints
70196
Is there any well-ordered uncountable set of real numbers under the original ordering?
72371
Proof of Strong Induction Using Well-Ordering Principle
68230
The cardinality of a countable union of sets with less than continuum cardinality
132537
Class of sets of a given infinite cardinality
122684
How do you prove Well-Ordering without Mathematical Induction? (and vice-versa)
19924
Uncountable ordinals without power set axiom
28183
Probability of selecting an even natural number from the set $\Bbb N$.
93501
Order of precedence of set operators