_or Blank[] is a pattern object that can stand for any Mathematica expression. _h or Blank[h] can stand for any expression with head h.

Language is a global option that specifies the language in which menus, dialog boxes, error messages, and help files are displayed.

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

GroupCentralizer[group, g] returns the centralizer of the element g in group.

There are many detailed differences between different kinds of computer systems. But one of the important features of Mathematica is that it allows you to work and create ...

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 ...

Do Basic Calculations Do Constrained Nonlinear Optimization Control the Precision and Accuracy of Numerical Results

"Basic Plotting" describes how to plot curves in Mathematica in which you give the y coordinate of each point as a function of the x coordinate. You can also use Mathematica ...

Select[list, crit] picks out all elements e_i of list for which crit[e_i] is True. Select[list, crit, n] picks out the first n elements for which crit[e_i] is True.

This tutorial introduces some basic algorithms for computing with finite permutation groups, other than those introduced in "Permutation Groups". A subgroup H of a group G ...