Work

Infinite time aggregation for the critical Patlak‐Keller‐Segel model in ℝ 2

Year: 2007

Type: article

Abstract: We analyze the two‐dimensional parabolic‐elliptic Patlak‐Keller‐Segel model in the whole Euclidean space ℝ 2 . Under the hypotheses of integrable initial data with finite second moment and entropy, we first show local‐in‐time existence for any mass of “free‐energy solutions,” namely weak solutions with some free‐energy estimates. We also prove that the solution exists as long as the entropy is controlled from above. The main result of the paper is to show the global existence of free‐energy solutions with initial data as before for the critical mass 8π/χ. Actually, we prove that solutions blow up as a delta Dirac at the center of mass when t → ∞ when their second moment is kept constant at any time. Furthermore, all moments larger than 2 blowup as t → ∞ if initially bounded. © 2007 Wiley Periodicals, Inc.

Source: Communications on Pure and Applied Mathematics

DOI: 10.1002/cpa.20225

Authors: Adrien Blanchet, José A. Carrillo, Nader Masmoudi

Institutions: Universitat Autònoma de Barcelona, Centre de Recerca Matemàtica, Institució Catalana de Recerca i Estudis Avançats, Courant Institute of Mathematical Sciences, New York University

Language: English

Topic: Mathematical Biology Tumor Growth

Subfield: Modeling and Simulation

Field: Mathematics

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, Ministerio de Economía y Competitividad, European Social Fund

Award: Asymptotic Problems in Fluid Mechanics, Gas Dynamics and Quantum Mechanics