If this is one focus point right here, and this is the other focus point, this ellipse could be defined as the set of all points, or the locus of all points, where if I take the distance of any one of these points that exist on the ellipse and take the distance to each of the locuses-- sorry, each of the focuses-- if I take that-- nope, I don't want to do that-- if I take that distance and add it to this distance, so