Weird artifacts with sans serif fonts in math mode

Asked Aug 08 '17 at 18:50

Active Aug 08 '17 at 19:01

Viewed 184 times

I have followed this https://tex.stackexchange.com/a/385068/80468 advice to enable me to change the font with \sffamily in math mode:

\DeclareMathVersion{sfmath}
\SetSymbolFont{letters}{sfmath}{OT1}{\sfdefault}{m}{n}
\xapptocmd{\sffamily}{\mathversion{sfmath}}{}{}

However, this gives some weird artifacts, particularly with the use of lowercase Greek characters and periods. In fact, periods are converted to colons, so that

{\sffamily $a_1 \ldots a_n$} actually prints as if I was typing {\sffamily $a_1 ::: a_n$}.

What is the best way to overcome this?

Edit (minimal working example)

\documentclass[american, hidelinks]{report}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

\usepackage{xpatch}

% Math fonts.
\DeclareMathVersion{sfmath}
\SetSymbolFont{letters}{sfmath}{OT1}{\sfdefault}{m}{n}

\xapptocmd{\sffamily}{\mathversion{sfmath}}{}{}

\begin{document}

{\sffamily
\[
  a_1 \ldots a_n = \mathit{foo}
\]
}

\end{document}

gives

edited Aug 08 '17 at 19:01

asked Aug 08 '17 at 18:50

dow

1

Now I can reproduce the problem. I will remove my "answer". – Dr. Manuel Kuehner Aug 08 '17 at 19:08
1

The default encoding for letters is OML, mapping them in full to OT1 doesn't work. – Ulrike Fischer Aug 08 '17 at 19:37
It is unrelated to sans serif, you have changed the letters family from OML to OT1 which means you need to redefine almost every math command to the new layout, most likely you have removed lower case greek altogether (as OT1 does not have lower case greek) – David Carlisle Aug 08 '17 at 20:02
The answer you linked to is flawed in the first place: *very* strange, considering who authored it. – GuM Aug 08 '17 at 20:17
@GuM The answer is not flawed in any way. The OP is simply taking it for what it isn't supposed to do. – egreg Aug 08 '17 at 20:53
There is plenty of topics about sans serif math. – egreg Aug 08 '17 at 20:54

Weird artifacts with sans serif fonts in math mode

0 Answers0

Linked