In mathematics, real projective space, or RPn or \mathbb{P}_n(\mathbb{R}), is the topological space of lines passing through the origin 0 in Rn+1. It is a compact, smooth manifold of dimension n, and is a special case Gr(1, Rn+1) of a Grassmannian space.
1. But we have addressed '0 percent of the violations ... raised by RPN last month," Harris said, referring to the Natural Resources Ministry‘s environmental regulator by its acronym.