The term pre-ordered set is unambiguous and is always synonymous with a mathematical hierarchy. A ruling body of clergy organized into orders or ranks each subordinate to the one above it especially. Classroom Observations Teachers who are developing students capacity to look for and make use of structure help learners identify and evaluate efficient strategies for solution.
The hierarchy of quadrilaterals.
A body of persons in authority. The bishops of a province or nation. Most governments corporations and organized religions are hierarchical. Any system of persons or things ranked one above another.