How to make your own laTex math symbol?

How do you make your own laTex math symbol? Is i开发者_开发技巧t possible?

Of course you can. May be you can describe what kind of symbol you need. However it might be a good idea to have a look at LaTeX Comprehensive Symbol List or to try to find your symbol at Detexify. One example for a symbol is:

\newcommand*{\dotcup}{\ensuremath{\mathaccent\cdot\cup}}

it shows

a \cap with a dot in it http://kubieziel.de/tmp/dotcup.png