Example of a set which is not well ordered
86926
Why isn't this a well ordering of $\{A\subseteq\mathbb N\mid A\text{ is infinite}\}$?
132382
Showing a set is nowhere dense in $C([0,1])$
140106
How to prove a finite field is not ordered?
128692
Example of an infinite group where every element except identity has order 2
3663
Finding counterexamples in elementary set theory.
78300
Showing a set is closed other than giving a counterexample?
81927
Example of closed and bounded in $\mathbb Q$ set that is not compact
126569
Can we find a well ordering on an infinite set with no largest element?
85225
The set of integers is not open or is open
3896
A closed set in $(A, \mathcal T_A)$ that is not closed in $(X, \mathcal T)$
108309
An example of a non-abelian group of order $p^3$
115649
Proving two sets $A, B$ are order isomorphic
39129
Simplest Example of a Poset that is not a Lattice
3217
Construction of uncountably many non-isomorphic linear (total) orderings of natural numbers
45878
Elementary Set Theory: Ordinals, Well Orderings and Isomorphisms
30587
Uncountable well ordered set in $Z^-$ theory.
10839
Problem in Cardinality and Order