LaTeX symbols have either names (denoted by backslash) or special characters. They are organized into seven classes based on their role in a mathematical expression. This is not a comprehensive list. Refer to the external references at the end of this article for more information.
The Great, Big List of LATEX Symbols David Carlisle Scott Pakin Alexander Holt February 7, 2001 List of Tables 1 LATEX2εEscapable “Special” Char- acters.
The LaTeX language has a wide variety of special symbols for which markup commands have already been defined. These range from accents and greek letters to exotic mathematical operators. These LaTeX's symbols are grouped together more or less according to function.