[texhax] The At and the Asterisk in LaTeX

P. R. Stanley prstanley at ntlworld.com
Fri Jan 30 02:21:11 CET 2009

```Hi folks
1. What is the general significance of the asterisk "*" in LaTeX and
in particular, the xy package? I see it used in (0, 0))*{}, **\dir or
**\crv{}. Is it more than syntax sugar?
2. What about the "@" symbol?
I've no problem memorising the commands though it'd be helpful to
know what each part means.