Consider the following relations:
R1 = {(a, b) ∈
R2 ∣ a > b}, the
greater than relation
R2 = {(a, b) ∈
R2 ∣ a ≥ b}, the
greater than or equal to relation
R3 = {(a, b) ∈
R2 ∣ a < b}, the
less than relation
R4 = {(a, b) ∈
R2 ∣ a ≤ b}, the less
than or equal to relation
R5 = {(a, b) ∈
R2 ∣ a = b}, the
equal to relation...