Can a relation be transitive when it is symmetric but not reflexive?
42835
Example of a relation that is symmetric and transitive, but not reflexive
113391
Prove that if $A$ is transitive, then $\mathcal{P}(A)$ is transitive too.
109173
Why the Sets defined in the Cumulative Hierarchy transitive?
100149
If there are injective homomorphisms between two groups in both directions, are they isomorphic?
26592
The symmetric Difference
85338
Equivalence relations on classes instead of sets
130620
Identity type between A and B being non-empty implies non-emptiness of A and B?
105233
Is there a counterexample for the claim: if $A \oplus B\cong A\oplus C$ then $B\cong C$?
25155
Suppose $R$ and $S$ are transitive relations on $A$. Prove that if $S \circ R \subseteq R \circ S$ then $R \circ S$ is transitive.
90879
Why correlation is not "transitive"?
35577
relations - examples and counterexamples
134517
Is following contradictory? Can you give an example?
8481
System of congruence relations
151561
Proving 'Law of Excluded Middle' in Fitch system
75985
Given the functional dependencies of a relation is there more then one way to normalize it?
83744
is there a property of a category that is preserved by category isomorphism, but not equivalence?
122506
Relation on countable sets