摘要
文章讨论了定解问题ut=uxx+1/(1-1u)~λλ>0,t>0,0<x<l;u(t,0)=u(t,l)=0 t≥0;u(0,x)=0 0≤x≤l解的"熄灭"现象,得到:对不同的λ>0,存在函数l0(λ)及l(λ),当l<l0(λ)时解全局存在,当l>l3(λ)时解熄灭;l0(λ)与l3(λ)均是λ的连续减函数,且limλ→+∞l0(λ)=0、λ→li m+∞l3(λ)=0。
The phenomen "disappear" is the answer of the "definite solution{ut=uxx+1/(1-u)λ,λ〉0,t〉0,0〈x〈l,u(t,0)=u(t,l)=0 t≥0,u(0,x)=0 0≤x≤l"Which is being discussed in this article. The main result is the following: (1) With diffent ,λ〉0, function l0(λ) and l'(A), the solution is global existence when l〈l0(λ) and the solution is disappear when l〉 l0 (λ). (2) l0(λ) and l* (λ) are all continnal minus function and lim l0(λ) =0, lim l0 (λ) =0.
出处
《淮北煤炭师范学院学报(自然科学版)》
2007年第4期27-31,共5页
Journal of Huaibei Coal Industry Teachers College(Natural Science edition)
关键词
非线性抛物型方程
全局解
熄灭
the nonlinear parabolic equation
global existence of solution
disappear