Coprimality

Coprimality in sets

A set of integers ${\displaystyle S=\{a_{1},a_{2},\dots ,a_{n}\}}$ can also be called coprime or setwise coprime if the greatest common divisor of all the elements of the set is 1. For example, the integers 6, 10, 15 are coprime because 1 is the only positive integer that divides all of them.