Which one of the following relations on R is an equivalence relation?
(a) a R1 b ⇔ | a | = | b |
(b) a R2 b ⇔ a ≥ b
(c) a R3 b ⇔ a divides b
(d) a R4 b ⇔ a < b
The correct option (a) a R1 b ⇔ | a | = | b |
Explanation:
