• ### Unit 6: Relations and Functions

In this unit, you will learn about binary relations from a set $A$ to a set $B$. Some of these relations are functions from $A$ to $B$. Restricting our attention to relations from a set $A$ to the set $A$, this unit discusses the properties of reflexivity(R), symmetry(S), anti-symmetry(A), and transitivity(T). Relations that satisfy R, S, and T are called equivalence relations, and those satisfying R, A, and T are called partial orderings.

Completing this unit should take you approximately 4 hours.