
Reflexive:
Example: The relation R on {1,2,3} given by
R = {(1,1),(2,2),(3,3)} is reflexive
Symmetric:
Example: The relation R on {1,2,3} given by
R = {(1,1),(1,2),(2,1),(1,3)(3,1)} is symmetric
Transitive:
Example: The relation R on {1,2,3} given by
R = {(1,1),(1,2),(2,1),(2,2),(2,3)(1,3)} is transitive