**Chapter
34. **** Integrating Multivariable Functions** (.NET, C#, CSharp, VB, Visual Basic, F#)

The CenterSpace.NMath.Core
namespace includes classes for computing an approximation of the integral
of a **OneVariableFunction** over some
interval (Chapter 13).
These classes include **RombergIntegrator** and
**GaussKronrodIntegrator**,
which implement the **IIntegrator**
interface.

The CenterSpace.NMath.Analysis
namespace provides class **TwoVariableIntegrator**,
which computes the integral of a function of two variables. Class **TwoVariableIntegrator** computes the double
integral by breaking up the problem into repeated one-dimensional integrals.

The chapter describes how to use class **TwoVariableIntegrator**.