Large mass self-similar solutions of the parabolic-parabolic Keller-Segel model of chemotaxis.
In two space dimensions, the parabolic-parabolic Keller-Segel system shares many properties with the parabolic-elliptic Keller-Segel system. In particular, solutions globally exist in both cases as long as their mass is less than a critical threshold M(c). However, this threshold is not as clear in the parabolic-parabolic case as it is in the parabolic-elliptic case, in which solutions with mass above M(c) always blow up. Here we study forward self-similar solutions of the parabolic-parabolic Keller-Segel system and prove that, in some cases, such solutions globally exist even if their total mass is above M(c), which is forbidden in the parabolic-elliptic case.
Biler
Piotr
P
Instytut Matematyczny, Uniwersytet Wrocławski, pl.Grunwaldzki 2/4, 50-384 Wrocław, Poland. Piotr.Biler@math.uni.wroc.pl
Corrias
Lucilla
L
Dolbeault
Jean
J
D002633:Chemotaxis; D008954:Models, Biological