\sum and \prod math symbol are not displayed

[thast]

Hello, has anybody else encountered that same issue?
When using the SEG template with this script:
\documentclass{segabs} \usepackage{amsmath} \begin{document} \begin{equation} \mathcal{A} = \prod_{i=1}^n \sum_{j=1}^c (i + j) \end{equation} \end{document}
I get

While if I am using a more traditional document class (let say article), I get the correct output:
\documentclass{article} \usepackage{amsmath} \begin{document} \begin{equation} \mathcal{A} = \prod_{i=1}^n \sum_{j=1}^c (i + j) \end{equation} \end{document}

The behavior is consistent across platform with the latest 2017 version of the latex packages on Mac (texlive and mactex 2017) and on Windows (texlive and Miktex 2017).

Update: I have tried to compile it with an older distribution of latex on Mac (texlive 2016) and the problem disappears. Any idea then on how to fix the compatibility issue? Thanks a lot!

[yufengwa]

I encounter the same problem, the \int does not work, sad.

[XushanLu]

I have the same problem using a recent version of texlive (2018.20180505-1). Have not found a solution yet.