[@$3.1415rin]

the next chapter in my linear algebra lectures is about projective geometry and states that 2 circles on a plane have 4 intersection points, if not identitical. We only have 2, but the others are at infinity ... I'm really looking forward to it, since it's something you can imagine, at least a bit - maybe even something to contribute here. But for now I gotta go back to phi invariant subspaces, nilpotent matrices, so that's gonna be a hard night ...