Thanks to @HenriMenke, I know how to use Roboto font in math for letters (including Greek) and digits. Now, I'd like to use a sans serif font for math operators as well (say \int or \sum). AFAIK, Roboto does not provide such glyphs.

How can I do (I mostly use lualatex but I can use xelatex if necessary)?


You could use e.g. Fira Math:

\setmathfont{Fira Math}
\setmathfont[range=\int]{Fira Math}

 Hello world! 12345 $12345$

 \textit{abcdef} $abcdef$

 $\gamma = G$
  \[\int \sum  a^2 + b^2 = c^2 \]

enter image description here

  • Great (+1), thanks. That's clearly a very good alternative I did not think of at that time. But what's the problem with kpfonts? Is it too complex with non otf fonts? – cjorssen Feb 6 '19 at 20:17
  • Why should I spent a lot of time trying to figure out how to at best mix legacy math fonts (kpfonts) with opentype font (roboto) when there exist sans-serif math fonts now? – Ulrike Fischer Feb 6 '19 at 21:20
  • Sorry. No offense intented. So I guess the answer is: yes it is complex to mix legacy fonts and otf. It does not worth it. Thanks again. – cjorssen Feb 7 '19 at 10:21

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