Issues for the display of some mathematical stuff

[kermitt2]

See the example bellow - look if the error comes from the abstract (bad latex) and/or from MathJax and how to detect/fix this kind of latex pattern problem.

[Aazhar]

@kermitt2 \var , \lap and \Snpi don't seem to be correct macros : http://docs.mathjax.org/en/latest/tex.html#supported-latex-commands