In dimensions n ≥ 3, radially symmetric solutions to the parabolic-elliptic Keller-Segel system form a Dirac mass at the origin continuously via a minimal measure-valued solution, with the singular mass θ(t) increasing strictly and absorbing the entire mass asymptotically.
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Formation and Behavior of Dirac Singularities in the Parabolic-Elliptic Keller-Segel System in Dimensions $n\geq 3$
In dimensions n ≥ 3, radially symmetric solutions to the parabolic-elliptic Keller-Segel system form a Dirac mass at the origin continuously via a minimal measure-valued solution, with the singular mass θ(t) increasing strictly and absorbing the entire mass asymptotically.