On Sun, 23 Dec 2012 07:17:03 -0800, wrote:

Probably of little use,

No ****, sherlock. This IS Usenet, after all - the refuge of the over 40
crowd. I reckon it's been decades since anyone here studied maths. Or
wanted to.

Free, but I would like a donation for the postage, or collect from here,
just south of Leicester

Your sig is busted, along with your from line.