lecture on 22/02

Next Tuesday I cannot be on campus, unfortunately, so I just uploaded slides for the material covering that lecture. For convenience, I also uploaded a recorded version of these slides in case you prefer listening to a more lecture style-setup. Next Friday (29/02), we will continue with the usual physical lecture, starting from the end of the uploaded material (at the beginning of next Friday's session, there will also be sufficient room to answer any question you may have about next Tuesday's material -- so the better you come prepared, the more time we'll spend on this).