Okay my fault, haven't looked into enough details on this .. found the answer myself with some further research.
I noticed the |
at the end of every equation and looked into this and found the answer here:
This is a change in Chrome, affecting MathJax 2.5, which ships with Jupyter Notebook 4.1. Notebook 4.2 will bundle MathJax 2.6, which will fix this problem. In the meantime, you can tell the notebook to use latest MathJax from the CDN, by adding to ~/.jupyter/jupyter_notebook_config.py
:
c.NotebookApp.mathjax_url = "https://cdn.mathjax.org/mathjax/latest/MathJax.js"
An alternative workaround would be, to set the markdown cell math renderer to "Fast HTML", as mentioned by Richard Ambler in the comments to the same question linked above.