Omsk branch of Mathematical center in Akademgorodok is happy to start working in this academic year. As before will be held online.
The meeting will take place on October 8 at 18:00 (Omsk time), 19:00 (Novosibirsk time), 08:00 (New York time), 15:00 (Moscow time). Vitaly Roman'kov will present his talk "Positive elements and membership problem for submonoids of finitely generated nilpotent groups of class 2".
We show that there is a finitely generated group G of class 2 with undecidable membership problem for finitely generated submonoids. Thus the well-known problem by M. Lohrey and B. Steinberg is solved. A criterion of potentially positivity of a set of elements of a free nilpotent group N of class 2 is also given. This criterion is used for a presentation of some sufficient conditions for decidability of the membership problem for a submonoid of N.
Preliminary future speakers: A. Miasnikov, V. Remeslennikov, M. Lohrey, A. Treyer.
You can connect to the Zoom conference via this link: or manually in the Zoom app using the conference ID 812 2079 3393.
Please pay attention to the following rules for conducting an Internet seminar:
- Please, use your real first and last name
- Keep your microphone off during the talk
- Should you have any questions, ask them in the chat
