Example of a relation that is reflexive but not symmetric
31392
Examples and Counterexamples of Relations which Satisfy Certain Properties
87983
Examples of Separable Spaces that are not Second-Countable
85507
Equivalence Relation problem
89167
Cardinality of equivalence relations in $\mathbb{N}$
19996
Example where union of increasing sigma algebras is not a sigma algebra
115350
An example of a Banach space isomorphic but not isometric to a dual Banach space
65486
Contraposition and law of excluded middle
53101
Is it true that the relation |A| < |B| is a sufficient condition for claiming that $f$ is a bijection?
13961
An example of a lattice that's not totally ordered
77337
Is an Anti-Symmetric Relation also Reflexive?
85819
A non-polyhedral pair $(X,A)$ with both $X$ and $A$ polyhedral
114329
Example of subring that is not an ideal
105233
Is there a counterexample for the claim: if $A \oplus B\cong A\oplus C$ then $B\cong C$?
6955
A Banach space is reflexive if and only if its dual is reflexive
134517
Is following contradictory? Can you give an example?
69043
The equivalence relation generated by a relation
129227
An example of neither open nor closed set