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.
âI think it's hard sometimes, when new rectors are appointed to churches, for congregations to be completely open in their welcome.â. âTickets are available from the rector, church wardens and the parish office.â. âThe husband of a church rector will be pedalling 1,000 miles to raise money to repair the church roof.â. âThe eldest son is the rector of four conjoined parishes nearby.â. 1.1 (in other Anglican Churches) a member of the clergy who has charge of a parish.