Definition:Composite


 * Composite (Abstract Algebra): the value at $$\left({a_1, a_2, \ldots, a_n}\right)$$ of the $n$-ary operation defined by $\circ$.
 * Composite number: A number greater than $$1$$ which is not a prime.
 * Composition of Mappings or Relations: $$\mathcal{R}_2 \circ \mathcal{R}_1 = \left\{{\left({x, z}\right): x \in S_1, z \in S_3: \exists y \in S_2: \left({x, y}\right) \in \mathcal{R}_1 \land \left({y, z}\right) \in \mathcal{R}_2}\right\}$$.