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.
In the Roman Catholic Church, a parish (Latin: parochus) is a stable community of the faithful within a Particular Church, whose pastoral care has been entrusted to a parish priest (Latin: pastor), under the authority of the diocesan bishop.ost parishes are territorial parishes, which comprise all Catholics living within a defined geographic area. A parish may be joined with others in a deanery or vicariate forane and overseen by a vicar forane, also known as a dean or archpriest.