PrivateNotebookOptions -> {opt_1 -> val_1, opt_2 -> val_2, ...} is an option for notebooks that specifies various low-level notebook settings.

StringReplace["string", s -> sp] or StringReplace["string", {s_1 -> sp_1, s_2 -> sp_2, ...}] replaces the string expressions s_i by sp_i whenever they appear as substrings of ...

PseudoInverse[m] finds the pseudoinverse of a rectangular matrix.

Mathematica makes it easy to "bulletproof" packages, and prevent features of their environment from affecting their internal operation.

Assuming[assum, expr] evaluates expr with assum appended to $Assumptions, so that assum is included in the default assumptions used by functions such as Refine, Simplify, and ...

Around 1870, Marius Sophus Lie realized that many of the methods for solving differential equations could be unified using group theory. Lie symmetry methods are central to ...

ImportString["data", " format"] imports data in the specified format from a string. ImportString["data", elements] imports the specified elements.ImportString["data"] ...

Functions for constructing matrices. This generates a 2×2 matrix whose i,j^th entry is a[i,j]. Here is another way to produce the same matrix.

MouseAppearance[expr, graphic] changes the mouse cursor to appear as graphic when the mouse pointer is in the area where expr is displayed.MouseAppearance[expr, graphic, {x, ...

RenderMan RIB user entity file. 3D geometry format. Used for photorealistic modeling and rendering. Stores 3D object definitions and scene descriptions. Native format of the ...