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.
a person appointed to superintend or preside. 2. an administrative officer in any of various colleges and universities who holds high rank and is concerned with the curriculum, faculty appointments, etc. 3. Ecclesiastical. the chief dignitary of a cathedral or collegiate church.