Mathematica contains some powerful primitives for making structural changes to expressions. You can use these primitives both to implement mathematical properties such as ...

SymbolName[symbol] gives the name of the specified symbol.

Unevaluated[expr] represents the unevaluated form of expr when it appears as the argument to a function.

Names["string"] gives a list of the names of symbols which match the string. Names[patt] gives a list of names matching the arbitrary string pattern patt.

GraphML graph data format. Standard exchange for graphs. GraphML is an acronym derived from Graph Markup Language. XML-based format. Represents typed, attributed, directed, ...

Here the standard procedure used by Mathematica to evaluate expressions is described. This procedure is the one followed for most kinds of expression. There are, however, ...

Pajek graph language and data format. Commonly used exchange format for graphs. Native format of the Pajek network analysis software. The format name is Slovenian for spider. ...

Function[body] or body & is a pure function. The formal parameters are # (or #1), #2, etc. Function[x, body] is a pure function with a single formal parameter x. ...

Appearance is an option for displayed objects such as Button and Slider that specifies the general type of appearance they should have.

In[n] is a global object that is assigned to have a delayed value of the n\[Null]^th input line.