Join of finitely many direct factors

Definition
A subgroup of a group is termed a join of finitely many direct factors if it can be expressed as the join of finitely many subgroups, each of which is a direct factor of the whole group.

Stronger properties

 * Weaker than::Direct factor: The strictness follows from the fact that direct factor is not finite-join-closed.

Weaker properties

 * Stronger than::Join-transitively central factor
 * Stronger than::Central factor
 * Stronger than::SCAB-subgroup
 * Stronger than::Conjugacy-closed normal subgroup
 * Stronger than::Transitively normal subgroup
 * Stronger than::Normal subgroup