Left Unique Relation
A Binary Relation where there is at most one s.t
Right Unique Relation
A Binary Relation where there is at most one s.t
A Binary Relation {(x,y)∣xRy},x∈X,y∈Y where ∀y∈Y, there is at most one x∈X s.t xRy
A Binary Relation {(x,y)∣xRy},x∈X,y∈Y where ∀x∈X, there is at most one y∈Y s.t xRy