Unitize[x] gives 0 when x is zero, and 1 when x has any other numerical value.

lhs =!= rhs yields True if the expression lhs is not identical to rhs, and yields False otherwise.

$PrePrint is a global variable whose value, if set, is applied to every expression before it is printed.

Turning conditions into numbers. Boole[expr] is a basic function that turns True and False into 1 and 0. It is sometimes known as the characteristic function or indicator ...

Mathematica's ability to deal with symbolic expressions, as well as numbers, allows you to use it for many kinds of mathematics. Calculus is one example. With Mathematica, ...

The aim of these tutorials is to provide a self-contained working guide for solving different types of problems with DSolve. The first step in using DSolve is to set up the ...

GetComplexClass[] returns the Java class used for complex numbers sent from, and returned to, Mathematica.

Periodicals[] returns a list of integer ID numbers corresponding to the set of operations that are periodically performed automatically when the kernel is not busy with ...

SetComplexClass[classname] specifies the Java class to use for complex numbers sent from, and returned to, Mathematica.

AdjacencyGraph[amat] gives the graph with adjacency matrix amat.AdjacencyGraph[{v_1, v_2, ...}, amat] gives the graph with vertices v_i and adjacency matrix amat.