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 vicar (/ËvÉªkÉr/ ; Latin: vicarius) is a representative, deputy or substitute; anyone acting in the person of or agent for a superior (compare vicarious in the sense of at second hand). Linguistically, vicar is cognate with the English prefix vice, similarly meaning deputy.. vicar forane, also known as an archpriest or dean, is a priest entrusted by the bishop with a certain degree of leadership in a territorial division of a diocese or a pastoral region known as a vicarate forane or a deanery.