As you probably know, I will give the next, and last, three lectures. For technical reasons I would prefer not to use Webex. As an alternative, I propose either Google Meet or Zoom. However, if any of you has a definite preference for Webex, I will use it anyway. Otherwise, you can endorse either Google Meet or Zoom, if you have a preference, by writing to luca.bernardinello@unimib.it. If you know how to make Webex to work decently on Linux, please let me know.

                Luca Bernardinello