# QED symbol in latex

## QED symbol in latex

You can use `blacksquare`

■:

When creating TeX, Knuth provided the symbol ■ (solid black square), also called by mathematicians tombstone or Halmos symbol (after Paul Halmos, who pioneered its use as an equivalent of Q.E.D.). The tombstone is sometimes open: □ (hollow black square).

```
documentclass{scrartcl}
usepackage{amssymb}
begin{document}
$backslash$blacksquare: $blacksquare$
$backslash$square: $square$
end{document}
```

You can easily find such symbols with http://write-math.com

When you want to align it to the right, add `hfill`

.

I use:

```
renewcommand{qed}{hfillblacksquare}
newcommand{qedwhite}{hfill ensuremath{Box}}
```

#### QED symbol in latex

If you `usepackage{amsmath}`

, the `blacksquare`

command will typeset a solid black square. The `square`

command will give you a hollow square.

The `ulsy`

package has a few version of the lightning bolt for contradictions: `blitza`

, `blitzb`

, …, `blitze`

. Just drop `usepackage{ulsy}`

into the preamble of your document.

Finally, as others have pointed out, the Comprehensive LaTeX Symbols List is a great resource for finding the perfect symbol for the job.