I have the problem with a symbol for symmetric difference (see http://en.wikipedia.org/wiki/Symmetric_difference). In commonly used is

```
\triangle
\ominus
```

But in Polish tradition often is used:

```
\dot{-}
```

and I would like to ask if it is possible to make dot be a little bit down to (close to) line (here where is the red dot).

## Best Answer

I've shifted the dot down relative to

`\dot{-}`

. You may adjust the value of`.2\LMex`

to suit.EDITED to make it more robust and to achieve a more uniform vertical spacing at the smaller math styles.