fontsmath-mode
In my latex document I would like to change the default font style (i.e italic) of the math mode to normal shape.
By now I am using \mathrm but is there a way to set the style of a specific math snippet?
Something like this:
\begin{align}[font=\rmfamily]
...
\end(align)
On a case-by-case basis, it is possible to typeset text within math mode using \textrm{...} or \mathrm{...}, the latter being used predominantly for typesetting units or symbols and not pure text (since it gobbles spaces that are not escaped). \mbox{...} is another alternative to \textrm{...}, since it resets its contents to text mode by default. Here are some examples:
\documentclass{article}
\begin{document}
Here is a formula: $x=\exp(\log \mathrm{x})$
Here is another: $\sin^2 t+\cos^2 t = \textrm{famous identity}$
\end{document}
The above font changes do not work that well in general, since switching to a different font when using sub- and superscripts, say, does not always scale as expected. There are ways around it though. For example, using \text{...} from the amstext package (automatically loaded by amsmath - see the AMS package dependencies), which switches to the appropriate font size via \mathchoice:
\documentclass{article}
\usepackage{amsmath}% http://ctan.org/pkg/amsmath
% amsmath loads the amstext package by default
\begin{document}
Here is a formula: $x=y^{abc}$
Here it is again: $x=y^{\mbox{abc}}$
Compare that to: $x=y^{\text{abc}}$
\end{document}
With standard fonts you can switch to bold mathematics via \mathversion{bold}:
\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:
\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.
Best Answer
Really strange demand..
Changing math font may help you---font Euler can be loaded by
\usepackage{euler}.In addition,
\usepackage[LGRgreek]{mathastext}may be what you are looking for, see here:Or, if you want to use your own font, have a look at the section 3.4 "Declaring math alphabets" of document fntguide (type
texdoc fntguidein terminal window).Indeed, I strongly advise not to do evil things like printing all math upright.. PLUS ONE.