This is completely incorrect.  There are two inputs and one output, e.g., ℝ⨯ℝ→ℝ.  Since there are two inputs, it&#x27;s a binary operator.  Since there are three inputs and outputs combined, it&#x27;s a ternary relation.<p>Likewise, a unary operator is a binary relation.  For example, x ↦ -x, or x ↦ x+1.