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GLOBAL GENERALIZED SOLUTIONS TO A PARABOLIC-ELLIPTIC KELLER-SEGEL SYSTEM WITH SINGULAR SENSITIVITY

机译:具有奇异敏感性的抛物线 - 椭圆keller-segel系统的全局广义解决方案

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摘要

We investigate the parabolic-elliptic Keller-Segel model {u_t=Δu-χ▽·(u/υ)▽υ,x∈Ω,t>0,0=Δυ-υ+u,x∈Ω,t>0,(∂u)/(∂ν)=(∂υ)/(∂ν)=0,x∈∂Ω,t>0,u(x,0)=u_0(ⅹ),x∈Ω, in a bounded domain Ω ⊂R~n (n≥2) with smooth boundary. We introduce a notion of generalized solvability which is consistent with the classical solution concept, and we show that whenever 0 <χ<n/(n-2) and the initial data satisfy only certain requirements on regularity and on positivity, one can find at least one global generalized solution.
机译:我们研究了抛物线 - 椭圆keller-segel模型{u_t =Δu-χ··(U /∞)▽,x∈ω,t> 0,0 =ΔΣ-υ+ u,x∈ω,t> 0, (∂U)/(∂ν)=(∂υ)/(∂ν)= 0,x∈∂ω,t> 0,u(x,0)= u_0(ⅹ),x∈ω,在界定中具有平滑边界的域Ω⊂r〜n(n≥2)。我们介绍了与经典解决方案概念一致的广义可解性的概念,我们表明,只要0 <χ

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