On Fri, 2011-08-12 at 10:43 +0800, Wu Fengguang wrote:> > s - x 3> > f(x) := 1 + (-----)> > l - s> > Looks very neat, much simpler than the three curves solution!Glad you like it, there is of course the small matter of real-worldbehaviour to consider, lets hope that works as well :-)