fontsmath-mode
% What to do here
\begin{document}
This is good integration.
$$\displaystyle \int x dx = \frac{x^2}{2}$$
\end{document}
I don't know much about LaTeX so I am going to need some spoon feeding.
I want text to appear in normal font. But math to appear in AMSEuler Font.
I don't want to make any changes inside the document.
Just reset \rmdefault to the definition it had before mathpazo was loaded.
\documentclass{article}
\let\temp\rmdefault
\usepackage{mathpazo}
\let\rmdefault\temp
\begin{document}
The quick brown fox jumps over the lazy dog.
\[
\int_a^b f(x) dx
\]
\end{document}
Comptuer Modern is intentionally light. It is better to choose a math font corresponding to your main text.
There is a package mathptmx in the psnfss bundle that sets the main text to ptm and fakes some corresponding math fonts. Using this gives better results than you are seeing. However, better would be to switch to a more modern solution provided by the newtxtext and newtxmath packages. Below are examples of each.
mathptmx
\documentclass[a4paper,oneside,12pt,table]{book}
\usepackage[T1]{fontenc}
\usepackage{amsmath,amssymb,amsfonts}
\usepackage{textcomp}
\usepackage{mathptmx}
\usepackage[scaled=0.92]{helvet}
\usepackage{microtype}
\begin{document}
\chapter{Introduction}
\section{First Section}
Some text which is OK! and some math which is the same weight:
\begin{equation}\label{e:barwq}
\begin{split}
H_c &=\frac{1}{2n} \sum^n_{l=0}(-1)^{l}(n-{l})^{p-2}
\sum_{l _1+\dots+ l _p=l}\prod^p_{i=1} \binom{n_i}{l _i}\\
&\quad\cdot[(n-l )-(n_i-l _i)]^{n_i-l _i}\cdot
\Bigl[(n-l )^2-\sum^p_{j=1}(n_i-l _i)^2\Bigr].
\end{split}
\end{equation}
\end{document}
newtxtext with newtxmath
\documentclass[a4paper,oneside,12pt,table]{book}
\usepackage[T1]{fontenc}
\usepackage[helvratio=0.92]{newtxtext}
\usepackage{newtxmath}
\usepackage{microtype}
\begin{document}
\chapter{Introduction}
\section{First Section}
Some text which is OK! and some math which is the same weight:
\begin{equation}\label{e:barwq}
\begin{split}
H_c &=\frac{1}{2n} \sum^n_{l=0}(-1)^{l}(n-{l})^{p-2}
\sum_{l _1+\dots+ l _p=l}\prod^p_{i=1} \binom{n_i}{l _i}\\
&\quad\cdot[(n-l )-(n_i-l _i)]^{n_i-l _i}\cdot
\Bigl[(n-l )^2-\sum^p_{j=1}(n_i-l _i)^2\Bigr].
\end{split}
\end{equation}
\end{document}
Best Answer
Just add either
\usepackage{euler}or\usepackage{eulervm}to your document's preamble:The
eulervmpackage includes many revisions by Zapf to the original Euler fonts. If you use theeulervmpackage, you will probably want to load it with the optionseuler-digitsandeuler-hat-accent, i.e., asIncidentally, the use of
$$ ... $$to generate display-math equations is heavily deprecated; it's much better to use\[and\], as I do in the example above. For much more on this subject, please see the postings Why is\[ ... \]preferable to$$and What are the differences between$$,\[, align, equation and displaymath?Addendum: There is no text font that's matched perfectly to
AMS Euler. If you provide the directive\usepackage{concrete}in the preamble, you'll get theConcrete Romantext font family.Concrete RomanandAMS Eulerwere used together (very successfully, I'd say) in the textbook Concrete Mathematics, 1st ed. 1988, 2nd. ed. 1994, by Ronald Graham, Donald Knuth, and Oren Patashnik. However, be forewarned thatConcrete Romanis a "raster font" and therefore won't look very good on screen. If the font is generated at 600 dpi, it'll look just fine in print; it's only the on-screen look that will likely disappoint. Other text fonts that are known to work well withAMS EulerarePalatino,Aldus, andMelior; perhaps not coincidentally, all three are creations of Hermann Zapf, the designer of theAMS Eulerfonts. To setPalatinoas the text font of your document, you could, e.g., issue the command\usepackage{newpxtext}.