Our approach is to do not keep any private data.
Only Anonymized Hits
For statistical reasons, we log only the hits of the browsed pages (i.e. timestamp, IP address and browsed page).
The site being comfortable enough to browse, we do not need to leave cookies in your system.
For reasons of compatibility and speed, we preferred not to overload the webpages with non-essential features. We have however made a small exception by using the "MathJax" library to display mathematical formulas.