# A centered plus-minus symbol

I'm using the amsbook document class with the psamsfonts and mathpazo packages. The minus sign touches the bottom of the text line. Is there a way to slightly miniaturize and vertically center the \pm symbol with the number?

\documentclass[psamsfonts]{amsbook}
\usepackage{mathpazo}

\begin{document}
$\pm 1$
\end{document}

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You shouldn't use mathpple, but rather mathpazo, which gives properly designed math symbols. Please specify in what context this "miniaturized" symbol should be used. –  egreg Jul 22 '11 at 9:01
Edited. Thanks. –  user02138 Jul 26 '11 at 9:49

For simple uses

\newcommand{\rpm}{\raisebox{.2ex}{$\scriptstyle\pm$}}


should do. If you need a very accurate measuring

\newcommand{\rpm}{\sbox0{$1$}\sbox2{$\scriptstyle\pm$}
\raise\dimexpr(\ht0-\ht2)/2\relax\box2 }


If you need the symbol also in subscripts or superscripts, something else is needed.

The psamsfonts option is obsolete, as far as I remember.

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Thank you! Is psamsfonts superseded by any package? –  user02138 Jul 26 '11 at 10:10
No, the PostScript fonts are used automatically and the option does nothing, apart issuing a warning. –  egreg Jul 26 '11 at 10:17