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.
docâ¢tor (ËdÉk tÉr) n. 1. a person licensed to practice medicine, as a physician, surgeon, dentist, or veterinarian. 2. a person who has been awarded a doctor's degree. 3. any of several artificial angling flies. 4. an eminent scholar and teacher.