"Defining Variables" discussed assignments such as x=y which set x equal to y. Here we discuss equations, which test equality. The equation x==y tests whether x is equal to ...

lhs != rhs or lhs != rhs returns False if lhs and rhs are identical.

Mathematica has many special features that optimize the entry and editing of both ordinary text and Mathematica input in notebooks.

Calculus lets you approximate complicated functions with power series. Mathematica lets you generate and work with power series for a huge range of functions.

The time it takes Mathematica to perform a computation is important information that can help you write efficient programs. Conveniently, you can display the time elapsed for ...

Exact symbolic results are usually very desirable when they can be found. In many calculations, however, it is not possible to get symbolic results. In such cases, you must ...

You can search for Mathematica help from within Mathematica or on the Wolfram Research websites. The complete documentation is available in every copy of Mathematica as well ...

Cross[a, b] gives the vector cross product of a and b.

JacobiP[n, a, b, x] gives the Jacobi polynomial P_n^(a, b)(x).

With[{x = x_0, y = y_0, ...}, expr] specifies that in expr occurrences of the symbols x, y, ... should be replaced by x_0, y_0, ....