Ampersand, &, inside a theorem?

Question

When I try to write the symbol "&" inside a theorem it looks different than I want it to. Is there a way to get the symbol inside the theorem? Here is what I get:

Here is the code:

\documentclass[a4paper]{memoir}
\usepackage{amsmath}
\usepackage{amsthm}
\newtheorem{theo}{Theorem}

\begin{document}
    Outside theorem \&
\begin{theo}
    Inside theorem \&

    Inside theorem 2 \text{\&}
    \end{theo}
\end{document}

Do you see how to fix this?

Theorems are italic by default. You could use {\normalfont \&} in these cases as described in this answer. — epR8GaYuh, May 02 '17 at 09:48
@egreg Inside a proof referring to and article written by two mathematicians. The article uses "&" instead of "and" between the names. — user119615, May 02 '17 at 14:33
Use “and” instead, they're not a business company. ;-) — egreg, May 02 '17 at 14:40

JPi · Answer 1 · 2017-05-02T13:25:34.700

3

The suggestions in the comments work, but it sounds to me like you still want a properly italic ampersand, just not in that design. There are two solutions to this:

Use a different font altogether. Tgtermes is close to computer modern (the default tex font), but gives you the ampersands that you want.

\documentclass[a4paper]{memoir}
\usepackage{amsmath}
\usepackage{amsthm}
\usepackage{tgtermes}
\newtheorem{theo}{Theorem}

\begin{document}
    Outside theorem \&
\begin{theo}
    Inside theorem \&

Inside theorem 2 \&
\end{theo}

\end{document}

Borrow an individual character from another font. See e.g. Font substitution with XeLaTeX

edited May 02 '17 at 13:25

answered May 02 '17 at 12:42

JPi

13,595

Inside a list you need to indent code blocks by eight instead of four spaces – cgnieder May 02 '17 at 13:24
Package tgtermes gives you the font Computer Modern in math mode, but the font Times in text mode, hence the different (Times) ampersand. – Rosie F May 29 '17 at 08:00

Ampersand, &, inside a theorem?

1 Answers1