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.he Provost has special responsibility for fostering intellectual interactions across the University, including the five Interfaculty Initiatives (environment, ethics and the professions, schooling and children, mind/brain/behavior, and health policy).