Since some people have had problems accessing the previous URL's given, the library is now available from the following locations: www.johnmaddock.co.uk/toolkit Or http://freespace.virgin.net/boost.regex/toolkit/index.html Or Go to the Boost Vault at http://boost-consulting.com/vault and cd into the "Math - Numerics" directory. Note that the code and documentation are separate downloads. In addition there is the subset of Boost-1.34 used by the lib here: http://freespace.virgin.net/boost.regex/toolkit/miniboost.zip Please note that the lib will not build with Boost-1.33.1 since it uses some parts of Boost.TR1. And finally... Bleeding edge cvs access is available via the Boost-Sandbox: http://sourceforge.net/projects/boost-sandbox/ Once you have checked out the sandbox you will need to do a: cvs update -r math_toolkit at which point everything should disappear except the current math-toolkit code. Regards, John Maddock.