well separated and that means that if we initialize the query remember the query here is a vector that kind of sort of looks like a pattern and that means the query is kind of close to the pattern in some notion of distance so if we initialize the query somewhere in that sphere then it might if it converges to that sphere to that pattern then we retrieve the pattern okay now it gets a bit more complicated than this but not much more so we say a pattern is stored if there is a single fixed point inside the sphere to which all points