Repeated patterns. Multiple blanks such as x__ allow you to give patterns in which sequences of arbitrary expressions can occur. The Mathematica pattern repetition operators ...

The notion of expressions is a crucial unifying principle in Mathematica. It is the fact that every object in Mathematica has the same underlying structure that makes it ...

Work with Spline Functions Create Graphics with Spline Primitives Create Plots

int MTensor_setMTensor (MTensor t, MTensor val, mint*pos, mint numpos) sets a subtensor element in an MTensor.

"Introduction to Manipulate" and "Introduction to Dynamic" provide most of the information you need to use Mathematica's interactive features accessible through the functions ...

Mathematica includes many controls and structures related to controls as part of its core language. These control objects are supported in a completely seamless way ...

Compositions[n, k] gives a list of all compositions of integer n into k parts.

NumberOfCompositions[n, k] counts the number of distinct compositions of integer n into k parts.

RandomComposition[n, k] constructs a random composition of integer n into k parts.

FrameBox[box] is a low-level box construct which represents box with a frame drawn around it.