Question

For each of the following relations on the set {1,2,3,4}, judge whether it is reflexive, symmetric, antisymmetric and/or transitive.
a. {(2,4), (4,2)) (1 mark)
b. {(1,2), (2,3), (3,4)} (1 mark)
c.{(1,1), (2,2), (3,3), (4,4)} (1 mark)
d. {(1,3), (1,4), (2,3), (2,4), (3,1), (3,4)} (1 mark)
{(1,1), (1,2), (2,1), (2,2), (3,3), (4,4)} (1 mark)

Answer 1

The answer is
A. 6,6
B. 6,9
C. 10,10
D. 12,19
E. 13,13