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arXiv 1609.09607math-phmath.MP
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具有非常数扩散系数的非线性反应扩散系统的条件对称性和精确解

Conditional symmetries and exact solutions of nonlinear reaction-diffusion systems with non-constant diffusivities

Roman Cherniha, Vasyl' Davydovych

摘要:

研究了具有非常数扩散系数的一般两组分反应扩散系统的Q-条件对称性(非经典对称性)。利用最近引入的第一类Q-条件对称性的概念,导出了一个允许这种对称性的反应扩散系统的穷尽列表。将反应扩散系统的结果与标量反应扩散方程的结果进行了比较。将反应扩散系统化为二维动力系统的对称性,即,常微分方程系统,并寻找精确解。结果,构造了具有任意扩散系数的非线性反应扩散系统的多参数显式精确解族。最后,应用精确解求解生物和物理激励系统。

英文摘要:

Q-conditional symmetries (nonclassical symmetries) for the general class of two-component reaction-diffusion systems with non-constant diffusivities are studied. Using the recently introduced notion of Q-conditional symmetries of the first type, an exhausted list of reaction-diffusion systems admitting such symmetry is derived. The results obtained for the reaction-diffusion systems are compared with those for the scalar reaction-diffusion equations. The symmetries found for reducing reaction-diffusion systems to two-dimensional dynamical systems, i.e., ODE systems, and finding exact solutions are applied. As result, multiparameter families of exact solutions in the explicit form for a nonlinear reaction-diffusion system with an arbitrary diffusivity are constructed. Finally, the application of the exact solutions for solving a biologically and physically motivated system is presented.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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