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 provost is the senior academic administrator at many institutions of higher education in the United States and Canada, the equivalent of a pro-vice-chancellor at some institutions in the United Kingdom and Ireland or a Deputy Vice-Chancellor (Academic) at most Australian universities.