GraphicsGroup[{g_1, g_2, ...}] represents a collection of graphics objects grouped together for purposes of interactive selection in a notebook.

LinearOffsetFunction is an option for linear and generalized linear model fitting functions that specifies a component for the model that is to be assumed known.

Parallelization is an option for Compile that specifies whether it should create a compiled function that could run in parallel.

PixelValue[image, {x, y}] gives the pixel value of image at position {x, y}.PixelValue[image, {x, y}, " type"] gives the pixel value converted to the specified type.

Prolog is an option for graphics functions which gives a list of graphics primitives to be rendered before the main part of the graphics is rendered.

Regularization is an option for Sum and Product that specifies what type of regularization to use.

Partial differentiation operations. This gives ( ∂ ) / ( ∂x ) x^n. This gives the third derivative.

The Mathematica front end provides an Insert > Table/Matrix submenu for creating and editing arrays with any specified number of rows and columns. Once you have such an ...

Front end tokens let you perform kernel commands that would normally be done using the menus. Front end tokens are particularly convenient for writing programs to manipulate ...

Mathematica can be used to make plots of functions. You give Mathematica a function, and it builds up a curve or surface by evaluating the function at many different points. ...