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 vice-chancellor (commonly called a VC) of a university in England, Wales, Northern Ireland, New Zealand, Australia, India, Bangladesh, Malaysia, Pakistan, Sri Lanka, other Commonwealth countries, and some universities in Hong Kong is the chief executive of the university.