Project Euler

http://projecteuler.net/

Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve. Although mathematics will help you arrive at elegant and efficient methods, the use of a computer and programming skills will be required to solve most problems.

The motivation for starting Project Euler, and its continuation, is to provide a platform for the inquiring mind to delve into unfamiliar areas and learn new concepts in a fun and recreational context.

Quantum Test Found For Mathematical Undecidability

Slashdot link: http://science.slashdot.org/article.pl?no_d2=1&sid=08/12/02/1756227

original article: http://arxivblog.com/?p=740

http://arxiv.org/abs/0811.4542
Mathematical undecidability and quantum randomness

dnAnalytics - a numerical library for the .NET Framework

dnAnalytics is a numerical library for the .NET Framework licensed under the Microsoft Public License. The library is written in C# and is available as a fully managed library, or as a native version that uses the Intel® Math Kernel Library (MKL). The native version of dnAnalytics provides significantly better performance when working with large sets of data. dnAnalytics is compatible with .NET 2.0 or later, and Mono. The managed version will run on a Windows XP or newer, and any platform that supports Mono. The native version supports 32bit and 64bit versions of Windows XP or newer, and 32bit and 64bit versions of Linux.

http://www.codeplex.com/dnAnalytics