Projection (set theory)
= Projection (set theory)
{wiki=Projection_(set_theory)}
In set theory, projection is a concept related to relations and the Cartesian product of sets. Given a set \\( S \\) and a relation \\( R \\subseteq S_1 \\times S_2 \\), a projection is a function that retrieves one part of the Cartesian product from the relation.