I apologise for the non-existent posting for the past week. I've been `in the tank' trying to fix the proof of a theorem in a 38 page paper. Anyone who knows about doing research in maths will realise that that's a fairly monstrous paper. It's a bit of a nightmare when you discover a mistake right in the middle. So...it had to be fixed. I think it's done now and the world is safe for mathematics once more. And tomorrow I go on a week's holiday.
See you when I get back.