The boundary of a convex set is always a convex curve. The intersection of all convex sets containing a given subset A of Euclidean space is called the convex hull of A. It is the smallest convex set containing A.
Rector (ecclesiastical) A rector is, in an ecclesiastical sense, a cleric who functions as an administrative leader in some Christian denominations, and in Islam. In contrast, a vicar is also a cleric but functions as an assistant and representative of an administrative leader.
Definition of dean. 1a : the head of the chapter of a collegiate or cathedral churchb : a Roman Catholic priest who supervises one district of a diocese. 2a : the head of a division, faculty, college, or school of a universityb : a college or secondary school administrator in charge of counseling and disciplining students.