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I would like to change the font "thickness" of the font in math mode. I already tried to find a similar method like \DeclareMathSizes but i didn't find something.

edit: I want to use - if possible - in math mode a font with serifs that is not as thin as the "typical" one. Since I'm trying to include latex formulas in powerpoint I need them for a presentation and, thus, a thicker font would be great. P.S.: To the best of my knowledge, I'm using pdflatex ;-)

Thanks for your help

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Please elaborate a bit on what you're looking to achieve. E.g., do you want "bold" to be the default math style? Finally, please indicate whether you're using pdfLaTeX, XeLaTeX, LuaLaTeX, or some other TeX engine/format. –  Mico Sep 13 '13 at 8:19
    
@Mico, thanks, I made an edit. I hope its now a bit clearer –  bonanza Sep 13 '13 at 8:26
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Thanks for clarifying your objectives. It looks like you should probably change both the text-mode and math-mode fonts. There are quite a few font families out there that may meet your needs. Have a look at Suggest a nice font family for my basic LaTeX template to get you started. –  Mico Sep 13 '13 at 8:47
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1 Answer

up vote 3 down vote accepted

With standard fonts you can switch to bold mathematics via \mathversion{bold}:

Sample bold switching

\documentclass{article}

\begin{document}

A mathematical test \( E = mc^2 \) and \( \int_0^1 \alpha(t)\,dt =
2\pi/3 \).  Here something that is already bold \(
\mathbf{x}\cdot\mathbf{y} = 1 \).

\mathversion{bold}

A mathematical test \( E = mc^2 \) and \( \int_0^1 \alpha(t)\,dt =
2\pi/3 \).  Here something that is already bold \(
\mathbf{x}\cdot\mathbf{y} = 1 \).

\end{document}

Alternatively consider using a different font set-up. One is provided by the fourier package:

Sample fourier

\documentclass{article}

\usepackage{fourier}

\begin{document}

A mathematical test \( E = mc^2 \) and \( \int_0^1 \alpha(t)\,dt =
2\pi/3 \).  Here something that is already bold \(
\mathbf{x}\cdot\mathbf{y} = 1 \).

\end{document}

Have a look at the LaTeX font catalogue for samples of other fonts with math support.

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