[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.
Thanks in advance for your help.

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