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.
parÂ·sonÂ·age. (pÃ¤râ²sÉ-nÄ­j) n. The official residence usually provided by a church for its parson; a rectory. parsonage. (ËpÉËsÉnÉªdÊ) n. (Ecclesiastical Terms) the residence of a parson who is not a rector or vicar, as provided by the parish.