Question

If \(R\) is a relation from \(A\) to \(B\), what is its co-domain?

Options

• The domain of \(R\)

• The set \(A\)

• The set \(B\)

• The range of \(R\) only

Answer 1

For a relation from \(A\) to \(B\), the set \(B\) is called the co-domain. The range may be a subset of this co-domain.