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.