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.
noun. 1  1(in the Church of England) the incumbent of a parish where all tithes formerly passed to the incumbent. âThe farmers now decided that they should also get some relief in their Tithe payments and deputations went to the rectors in the parish.â. 2  2The head of certain universities, colleges, and schools.