Seminár z algebraickej teórie grafov - Jozef Širáň (6.5.2022)
v piatok 6.5.2022 o 13:00 hod. v miestnosti M/X aj online formou
Od: Martin Mačaj
Prednášajúci: Jozef Širáň (STU Bratislava)
Názov: Why are there no regular maps on a Klein bottle?
We give three answers to the question in the title, with the help of double covers, the Riemann-Hurwitz formula, and homology.
Thanks to (temporary?) loosening of restrictions regarding the COVID epidemy, we intend to conduct the seminar meetings this semester `in-person'. Hence, all of you who might choose to attend in person are welcome. Those of you who are not able to attend in person or who are still uncertain about the safety of attending in person are welcome to attend via MS Teams. In either case, we hope to see as many of you as possible (either in person or virtually) at our Friday gatherings.