How to look up a symbol? Escape character in latex in the itemize environment, how do i use the ampersand symbol & without latex trying to use it as a command? Sometimes the symbol := is used to denote a definition.

When using latex, can i just use $:=$, or do i need to do something special? Latex still supports it for one reason or another, but the proper one to use, as defined in the specifications, is \[ \]. All this just means that they are not promising that $$ will always work. Q&a for users of tex, latex, context, and related typesetting systems