Okay, got one of them. The other is too deeply buried for me, I guess. :(

But it's always fun to read you, talking maths. I can grasp that the explanations would be perfectly clear if only I had the mathematical background--if that makes sense. Perhaps more like: it's that I can see the structure of what you are saying, even if the depth of meaning doesn't click. It's like looking at beautiful scenery through fog. I might as well not be frustrated because it's foggy, but just appreciate that I can glimpse a line here, a shadow there. Best I can do.