Asymptotic Behavior of Zeros of Solutions for Parabolic Equations
Asymptotic Behavior of Zeros of Solutions for Parabolic Equations
复制标题
抛物方程解的零点的渐近行为
DOI:
10.1006/jdeq.2000.3819
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发表时间:
2001
影响因子:
2.4
通讯作者:
N. Mizoguchi
中科院分区:
文献类型:
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作者:
N. Mizoguchi
Abstract Let p >1, α ⩾0, and ϕ ∈ L ∞ ( R )∩ L 1 ( R ) change its sign finite times. This paper is concerned with a Cauchy problem [formula] Define the set of zeros of a solution u by Z ( t )={ x ∈ R : u ( x , t )=0} for t >0. In the case of α =0, we show that the set Z ( t ) is contained in [− Ct , Ct ] for large t >0 with some C >0 and that this order of t is best possible. When α >0, we also give estimates of Z ( t ) for global solutions and prove that Z ( t )⊂[− K , K ] for all t ∈(0, T ) with some K >0 for each blowup solution, where T is the blowup time.
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