WEAK TRAVELLING WAVE FRONT SOLUTIONS OF GENERALIZED DIFFUSION EQUATIONS WITH REACTION

在线阅读 下载PDF 导出详情
摘要 Theauthordemonstratethatthetwo-pointboundaryvalueproblem{p′(s)=f′(s)-λp^β(s)fors∈(0,1);β∈(0,1),p(0)=p(1)=0,p(s)>0ifs∈(0,1),hasasolution(λ^-,p^-(s)),where|λ^-|isthesmallestparameter,undertheminimalstringentrestrictionsonf(s),byapplyingtheshootingandregularizationmethods.Inaclassicpaper,Kohmogorovet.al.studiedin1937aproblemwhichcanbeconvertedintoaspecialcaseoftheaboveproblem.Theauthoralsousethesolution(λ^-,p^-(s))toconstructaweaktravellingwavefrontsolutionu(x,t)=y(ξ),ξ=x-Ct,C=λ^-N/(N+1),ofthegeneralizeddiffusionequationwithreactionδ/δx(k(u)|δu/δx|^n-1δu/δx)-δu/δt=g(u),whereN>0,k(s)>0a.e.on(0,1),andf(a):=n+1/N∫0ag(t)k^1/N(t)dtisabsolutelycontinuousou[0,1],whiley(ξ)isincreasingandabsolutelycontinuouson(-∞,+∞)and(k(y(ξ))|y′(ξ)|^N)′=g(y(ξ))-Cy′(ξ)a.e.on(-∞,+∞),y(-∞)=0,y(+∞)=1.
机构地区 不详
出版日期 1994年03月13日(中国期刊网平台首次上网日期,不代表论文的发表时间)