Variable instability of a constant blow-up solution in a nonlinear heat equation

Variable instability of a constant blow-up solution in a nonlinear heat equation
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非线性热方程中恒定爆炸解的变量不稳定性

DOI:
10.2969/jmsj/1190905446
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发表时间:
2004
影响因子:
0.7
通讯作者:
Hiroki Yagisita
Hiroki Yagisita
中科院分区:
数学4区
文献类型:
--
作者:
Hiroki Yagisita

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. 本文研究了在Neumann边界条件下W中的半线性扩散方程的正解,其中p为常数,W为rn中具有c2边界的有界区域。该方程具有常数解ð p (cid:1) 1 Þ (cid:1) 1 = ð p (cid:1) 1 Þ ð t0 (cid:1) T Þ (cid:1) 1 = ð p (cid:1) 1 Þ ð 0 a T < t0 Þ,爆破时间为t0 > 0。表明任何e > 0和开放锥G f f CðWÞj fðxÞ> 0 G,存在一个积极的函数u 0ðx在WÞq 0 = qn¼0 qW和k u 0ðxÞ(cid: 1)ðp (cid: 1) 1Þ(cid: 1) 1 =ðp (cid: 1) 1ÞT (cid: 1) 1 =ðp (cid: 1) 1Þ0 k C 2ðWÞ< e这样的充气时间解决uðx;T Þ与初始数据u ð x;0 Þ¼u 0 ð x Þ大于T 0,函数u ð x;t0 Þ属于锥G。并给出了爆破剖面的一个定理。
. This paper is concerned with positive solutions of the semilinear di¤usion equation u t ¼ s u þ u p in W under the Neumann boundary condition, where p > 1 is a constant and W is a bounded domain in R N with C 2 boundary. This equation has the constant solution ð p (cid:1) 1 Þ (cid:1) 1 = ð p (cid:1) 1 Þ ð T 0 (cid:1) t Þ (cid:1) 1 = ð p (cid:1) 1 Þ ð 0 a t < T 0 Þ with the blow-up time T 0 > 0. It is shown that for any e > 0 and open cone G in f f A C ð W Þ j f ð x Þ > 0 g , there exists a positive function u 0 ð x Þ in W with q u 0 = qn ¼ 0 on qW and k u 0 ð x Þ (cid:1) ð p (cid:1) 1 Þ (cid:1) 1 = ð p (cid:1) 1 Þ T (cid:1) 1 = ð p (cid:1) 1 Þ 0 k C 2 ð W Þ < e such that the blow-up time of the solution u ð x ; t Þ with initial data u ð x ; 0 Þ ¼ u 0 ð x Þ is larger than T 0 and the function u ð x ; T 0 Þ belongs to the cone G . A theorem on the blow-up profile is also given.
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发表时间: 2006
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作者:
M.Iizuka;M.Maeno;M.Tomisaki;相川弘明;村田實;Minoru Murata;石毛和弘;相川弘明;志賀啓成;志賀啓成;相川弘明;志賀啓成;Kazuhiro Ishige;Minoru Murata;村田實;富崎松代;志賀啓成;石毛和弘
通讯作者: 石毛和弘
N.Mizoguchi:“半线性抛物线方程中双极爆炸的临界指数”J.Math.Anal.Appl。
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N.Mizoguchi:“半线性抛物型方程解的爆炸和寿命”SIAM J.Math.Anal。
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