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.
Dean (education) Dean of Faculty redirects here. It is not to be confused with the elected leader of the Faculty of Advocates. In academic administrations such as colleges or universities, a dean is the person with significant authority over a specific academic unit, or over a specific area of concern, or both. Deans are occasionally found in middle schools and high schools as well.