Remove[symbol_1, ...] removes symbols completely, so that their names are no longer recognized by Mathematica. Remove["form_1", "form_2", ...] removes all symbols whose names ...

Symbol["name"] refers to a symbol with the specified name.

Lists are widely used in Mathematica, and there are many ways to construct them. Some explicit ways to construct lists. This gives a table of the first five powers of 2.

When you write down a set of simultaneous equations in Mathematica, you are specifying a collection of constraints between variables. When you use Solve, you are finding ...

Defining local constants. Module allows you to set up local variables, to which you can assign values and then change them. Often, however, all you really need are local ...

You can give Solve a list of simultaneous equations to solve. Solve can find explicit solutions for a large class of simultaneous polynomial equations. Here is a simple ...

The hierarchy of levels at which options can be set. Here is a notebook containing three cells. This is what happens when the setting CellFrame->True is made specifically for ...

CPreprocessorIfdef[cond] is a symbolic representation of a preprocessor ifdef conditional.CPreprocessorIfdef[cond, true, false] represents the true and false cases.

LinkRanks[g] gives the link ranks of the directed graph g as a rule list.

WeakComponents[g] gives a list of all weakly connected components in the undirected graph g.