-----Original Message----- From: boost-bounces@lists.boost.org [mailto:boost-bounces@lists.boost.org] On Behalf Of Thijs van den Berg Sent: 29 November 2008 09:59 To: boost@lists.boost.org Subject: Re: [boost] [math distributions]
PS, I see no LambertW function in math::special_function. I'm sure Knuth is going to be very upset! :)
I'm entirely ignorant of other uses this has apart from this http://www.apmaths.uwo.ca/~rcorless/frames/PAPERS/LambertW/knuth&me.jpg (And some very pretty 3D colorplots ;-) http://en.wikipedia.org/wiki/Lambert_W_function gives some clues: "The Lambert W function cannot be expressed in terms of elementary functions. It is useful in combinatorics, for instance in the enumeration of trees. It can be used to solve various equations involving exponentials and also occurs in the solution of time-delayed differential equations, such as y'(t) = a y(t − 1)." But I'm sure you are right - Knuth will be very, very disappointed. Anyone with nothing better to do fancy implementing this? :-)) Paul --- Paul A. Bristow Prizet Farmhouse Kendal, UK LA8 8AB +44 1539 561830, mobile +44 7714330204 pbristow@hetp.u-net.com