The first parts are some reasonably hairy looking maths - much as it pains me to admit it I'm taking the advice in the very first section & skimming it (reasonably carefully) rather than absolutely trying to understand it. I'll have to come back to it later as I'm sure it'll be necessary. It's a little embarassing to put myself in the class of people that are 'not mathematically inclined' because, well, I am mathematically inclined, and I was really rather good at pure maths back when I was in practice. But I don't think I've done any maths since first year at university, and that doesn't really count as I didn't work at it (didn't need to pass the course, and there was too much mechanics for my tastes, so I didn't bother). So it's 14 years since I last seriously looked at a mathematics problem. And it shows :/ I think I need to get hold of an A-level standard pure maths text book and work my way through it. I wonder if my old school still have the one we used, and if they're likely to sell one if so. Wish I could remember the name of it, or the authors or anything, as I rather liked it.
Other geeky things - installed gourmet, finally, which I'd not been using since I reinstalled linux on this machine a few months ago. And found a bug in it (which I've duely reported). I was quite pleased with myself as I had to track down all the dependencies & install them (there's no gourmet ebuild). Small things, eh ;) Despite all that I've read about Gentoo being a hard distribution to use as a newbie/end-user now that it's actually installed I find it easier in some ways to use than any of the previous linux distributions we've used. OK, I don't do anything to the kernel myself & I get J to do the config file stuff that needs doing after rebuilds of stuff, but there's not very much of that. And it's offset by the fact that I can install my own software, on a whim mostly, with very little trouble, which certainly hasn't been the case in the past.