Many thanks for the responses by Doug McIlroy (off-list) and Ralph Corderoy. They are well-considered, and are having the effect I was hoping for -- namely, salutory comments on my manner of presentation, before I get too deeply dug in!
I can only work intermittently on this at the moment, so updates will happen as they happen, but I'll be doing my best to take account of these comments. Unfortunately[?!] my experience of using eqn goes back almost 30 years, so I have a lot to get off my chest. This perhaps tends to show inopportunely at times. My strategy so far has been to start off (as now) with a general beginner's basic introduction, at the same time exhibiting the diversity of mathematical expression that is possible even at this level. This will from time to time involve a bit of fancy footwork (e.g. the macro 'quadsol' for the generic solution of quadratic equations), but so far I don't think it's out of place, and should server as a "taster" for later developments. Lined up (a lot further down the line) is a systematic formal and technical overview of eqn. I'm still thinking about how best to serve this up. With thanks, and keep the comments coming! Best wishes to all, Ted. -------------------------------------------------------------------- E-Mail: (Ted Harding) <ted.hard...@wlandres.net> Fax-to-email: +44 (0)870 094 0861 Date: 30-Jan-11 Time: 21:50:04 ------------------------------ XFMail ------------------------------