What sort of mathematics do you use in your .Net app?

Question

Excluding everything that's in System.Math.

I think that System.Math is woefully inadequate. For example, in several official .Net frameworks, I can count 3 different implementations of matrices. Same goes for vectors. One implementation of a complex number; several different implementations of arbitrary rational numbers, and so on.

So, what would you like to see in a hypothetical System.Mathematics namespace?

Answer 1

I rarely need anything outside of basic 'accounting math'.

Answer 2

Expression evaluation like that in Flee or Dotmath (see here and here)

Answer 3

Generics support (since C# 3.0 doesn't allow use of generics and operators), like here.

Answer 4

Here is what I use:

• Numerical integrals
• Numerical derivatives
• FFTs
• Matrices
• Vectors
• Complex numbers
• Geometric types such as polygons, spheres, toroids, etc
• Gaussian distributions
• Navier-Stokes equations
• DSP filters
• Symbolic algebra
• Quaternions
• Optimisation
• Ordinary Differential Equations and ODE solvers
• Likewise for PDEs

Answer 5

Check http://msdn.microsoft.com/en-us/vcsharp/aa336740.aspx

Under the Math there are some links to some libraries for C#