Source: wikibot/system-of-imprimitivity
= System of imprimitivity
{wiki=System_of_imprimitivity}
The concept of a "system of imprimitivity" comes from the field of group theory and is often used in the study of group actions. In the context of group actions on sets, a system of imprimitivity is a partition of a set that is invariant under the action of a group.