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
中科院分区:
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作者:
Hiroki Yagisita
. 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.
DOI:
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发表时间:
2006
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影响因子:
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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
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