Seminarium:
Równania różniczkowe
Osoba referująca:
Tomasz Cieślak (IMPAN)
Data:
poniedziałek, 2. Grudzień 2019 - 15:15
Sala:
603
Opis:
Zapraszamy również drugi odczyt Tomasza Cieślaka w tym samym dniu
przed południem na Wydziale Matematyki Politechniki Wrocławskiej.
Szczegóły poniżej.
----
Referat pt.
One-dimensional fully parabolic quasilinear system of chemotaxis
with critical diffusion.
Streszczenie: In my talk I will speak about the system of two
one-dimensional parabolic
equations of Keller-Segel type with nonlinear diffusion of cells. I
will be mainly
focused on critical diffusion, criticality can be viewed via scaling
or (un)boundedness of a natural Liapunov functional related to the problem.
I will show that unlike in higher dimensions, in the case of critical
diffusion all solutions (independently on the size of initial mass) are
globally-in-time defined and they stay bounded. In higher dimensions one can
find such a value of mass m_* s.t. for initial mass of cells smaller than
m_* bounded solutions exist, while for initial mass of cells greater than m_*
solutions blowup in finite-time for sufficiently concentrated data.
The talk is based on two papers (T.Cieślak, K. Fujie, Proc. AMS 2018) and
(B. Bieganowski, T.Cieślak, K.Fujie, T.Senba, Math. Nachr. 2019).
Spotykamy się w sali 3.11, C-11, godz. 11:15.