[Tex/LaTex] How to write a solid plus sign

symbols

How do I write a solid plus sign, like the American Red Cross symbol/logo?

I'm a novice, so I'm not very good at going to CTAN archive and downloading and installing business — it doesn't work half the time. So it would be nice if it doesn't involve too exotic packages.

Edit : I would like to use it in math mode.

Best Answer

If you just want a fat plus sign, which need not be identical to the American Red Cross logo, a pure Unicode (LuaLaTeX) solution is possible. You just need a font that contains either the ✚ symbol (U+271A Heavy Greek Cross) or, perhaps preferably, the ➕ symbol (U+2795 Heavy Plus Sign).

Here’s an example using the (too?) heavy greek cross symbol from the free font DejaVu Sans:

\documentclass{article}

\usepackage{unicode-math}

\setmainfont{DejaVu Sans}
\setmathfont{DejaVu Sans}

\newcommand\fplus{\mathrel✚}

\begin{document}

Some simple(?) math: $2 \fplus 2 \neq 4$

\end{document}

Some simple(?) math: 2 ✚ 2 ≠ 4

This has the advantage that you can copy and paste the text from the resulting PDF document without losing the cross symbol.

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