共查询到20条相似文献,搜索用时 453 毫秒
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该文在L2中讨论了第一类算子方程Au=f当A-1无定义和A-1不是单值的情形下的不适定求解问题,给出了解存在的充要条件,当有解时,得到了形式解,多解时形式解就是最小范数解,并且得到了近似解表达式,给出了误差估计. 相似文献
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二阶半线性椭圆方程的径向解 总被引:2,自引:0,他引:2
本文讨论了无界域上的二阶半线性椭圆方程的径向解,给出了古典解的性质,诸如存在或非存在性,唯一性以及解的估计式等,这些性质清晰地描绘了古典解的性态。 相似文献
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讨论了Benjamin-Ono方程在Colombeau意义下的广义解的存在性,唯一性及在经典解存在的情况下与经典解的关系. 相似文献
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精确地刻画了某些奇异扰动的p-Laplace方程非负非平凡解和正解的结构.利用上下解方法证明,方程存在很多非负非平凡的尖峰解和正的过渡尖峰解.当参数充分小时还对每个尖峰解支集的上下界进行了估计. 相似文献
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双函数法及一类非线性发展方程的精确行波解 总被引:5,自引:0,他引:5
给出一种求解非线性发展方程精确行波解的新方法:双函数法。使用此方法,获得了一类非线性发展方程的许多精确行波解,其中包括孤波解和周期解,推广了文献用其它方法取得的结果,同时还获得了许多新的弧波解和周期解,借助于Mathemat-ica,此方法能部分地在计算机上实现。 相似文献
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王定江 《应用泛函分析学报》2002,4(4):328-332
讨论一类总数依赖非线性年龄结构种群模型的动力特性,给出了系统的一个等价问题,并讨论了系统的平衡解和非平衡解,得到了平衡解和非平衡解存在的充要条件。 相似文献
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二维RLW方程和二维SRLW方程的显式精确解 总被引:2,自引:0,他引:2
本文讨论了二维RLW方程和二维SRLW方程孤立波解的性态,通过直接积分的方法求出了这两个方程的显式精确孤立波解,并通过选取初始条件的方法求出了二维RLW方程和二维SRLW方程的另一类精确行波解. 相似文献
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周友明 《数学物理学报(A辑)》1996,16(2):200-204
在利用上下解方法研究非线性微分方程多重解问题时,人们普遍使用基本条件--非线性项满足单边Lipschitz条件。本文在没有假定这个基本条件的情况下,利用上下解方法证明了非线性Sturm-Liouville问题的一个三解定理,从而改进了有关的已知结果。 相似文献
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In this paper, we use the bifurcation method of dynamical systems to study the periodic wave solutions and their limits for the modified Kd V–KP equations. Some explicit periodic wave solutions are obtained. These solutions contain smooth periodic wave solutions and periodic blow-up solutions. Their limits contain solitary wave solutions, periodic wave solutions, kink wave solutions and unbounded solutions. 相似文献
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首先给出了运输问题最优解的相关概念,将最优解扩展到广义范畴,提出狭义多重最优解和广义多重最优解的概念及其区别.然后给出了惟一最优解、多重最优解、广义有限多重最优解、广义无限多重最优解的判定定理及其证明过程.最后推导出了狭义有限多重最优解个数下限和广义有限多重最优解个数上限的计算公式,并举例验证了结论的正确性. 相似文献
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Some new nonlinear wave solutions and their convergence for the (2+1)‐dimensional Broer–Kau–Kupershmidt equation 下载免费PDF全文
We use the bifurcation method of dynamical systems to study the (2+1)‐dimensional Broer–Kau–Kupershmidt equation. We obtain some new nonlinear wave solutions, which contain solitary wave solutions, blow‐up wave solutions, periodic smooth wave solutions, periodic blow‐up wave solutions, and kink wave solutions. When the initial value vary, we also show the convergence of certain solutions, such as the solitary wave solutions converge to the kink wave solutions and the periodic blow‐up wave solutions converge to the solitary wave solutions. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献
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In this paper, we use the bifurcation method of dynamical systems to study the traveling wave solutions for the Davey–Stewartson equation. A number of traveling wave solutions are obtained. Those solutions contain explicit periodic wave solutions, periodic blow‐up wave solutions, unbounded wave solutions, kink profile solitary wave solutions, and solitary wave solutions. Relations of the traveling wave solutions are given. Some previous results are extended. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
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In this paper, we study solution structures of the following generalized Lennard-Jones system in R~n,x=(-α/|x|~(α+2)+β/|x|~(β+2))x,with 0 α β. Considering periodic solutions with zero angular momentum, we prove that the corresponding problem degenerates to 1-dimensional and possesses infinitely many periodic solutions which must be oscillating line solutions or constant solutions. Considering solutions with non-zero angular momentum, we compute Morse indices of the circular solutions first, and then apply the mountain pass theorem to show the existence of non-circular solutions with non-zero topological degrees. We further prove that besides circular solutions the system possesses in fact countably many periodic solutions with arbitrarily large topological degree, infinitely many quasi-periodic solutions, and infinitely many asymptotic solutions. 相似文献
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《Communications in Nonlinear Science & Numerical Simulation》2014,19(6):1669-1674
We obtain closed-form exact solutions to the 1 + 1 Born–Infeld equation arising in nonlinear electrodynamics. In particular, we obtain general traveling wave solutions of one wave variable, solutions of two wave variables, similarity solutions, multiplicatively separable solutions, and additively separable solutions. Then, putting the Born–Infeld model into correspondence with the minimal surface equation using a Wick rotation, we are able to construct complex helicoid solutions, transformed catenoid solutions, and complex analogues of Scherk’s first and second surfaces. Some of the obtained solutions are new, whereas others are generalizations of solutions in the literature. These exact solutions demonstrate the fact that solutions to the Born–Infeld model can exhibit a variety of behaviors. Exploiting the integrability of the Born–Infeld equation, the solutions are constructed elegantly, without the need for complicated analytical algorithms. 相似文献
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In this paper, by means of the Jacobi elliptic function method, exact double periodic wave solutions and solitary wave solutions of a nonlinear evolution equation are presented. It can be shown that not only the obtained solitary wave solutions have the property of loop-shaped, cusp-shaped and hump-shaped for different values of parameters, but also different types of double periodic wave solutions are possible, namely periodic loop-shaped wave solutions, periodic hump-shaped wave solutions or periodic cusp-shaped wave solutions. Furthermore, periodic loop-shaped wave solutions will be degenerated to loop-shaped solitary wave solutions for the same values of parameters. So do cusp-shaped solutions and hump-shaped solutions. All these solutions are new and first reported here. 相似文献
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Xun-Hua Gong 《Nonlinear Analysis: Theory, Methods & Applications》2010,73(11):3598-3612
In this paper, we investigated vector equilibrium problems and gave the scalarization results for weakly efficient solutions, Henig efficient solutions, and globally efficient solutions to the vector equilibrium problems without the convexity assumption. Using nonsmooth analysis and the scalarization results, we provided the necessary conditions for weakly efficient solutions, Henig efficient solutions, globally efficient solutions, and superefficient solutions to vector equilibrium problems. By the assumption of convexity, we gave sufficient conditions for those solutions. As applications, we gave the necessary and sufficient conditions for corresponding solutions to vector variational inequalities and vector optimization problems. 相似文献