Methods in nonlinear analysis, applications to differential and variational problems, and scientific computations

在我的研究中，我正在开发新的数学方法来研究对称性对动力系统的影响。人们可以很容易地观察到，几乎每一种设计（例如建筑物、网络、设备配置等）有一定的对称性，这是我们追求优雅的表现。很少有人知道对称性如何影响这种设计的性能或可靠性（例如建筑物的抗震性，电力系统，化学过程）。即使在简单的模型中，也有困难的问题，导致复杂的分析，涉及先进的代数和分析方法。我的研究领域，等变分析，专注于创建新的工具（例如等变度），允许有效和完整的对称动力学过程的研究。我的兴趣有两方面：理论和应用。在理论部分，以各数学领域（如代数与等变拓扑、变换群、代数学、微分几何、微分方程、泛函分析等）的最新成果为基础我试图理解抽象的非线性对称方程的复杂性，这样就有可能提取有关解及其对称性的基本信息。这些信息导致新的计算方法的发展（涉及代数，拓扑和分析例程）。在应用部分，我们建立了标准设置并创建了全面的例程，允许使用计算机（例如Maple软件包为几组对称性创建），以便为用户提供快速准确的方法来分析动力系统，使我们的理论成果能够为应用数学家甚至工程师所用。例如，我们的方法被用来研究（电，化学或生物）振荡器的对称配置，在人口模型，或电传输线。

In my research I am developing new mathematical methods to investigate the impact of symmetries on dynamical systems. One can easily observe that almost every design (e.g. buildings, networks, configurations of devices, etc.) has certain symmetries, which are expressions of our tendencies for elegance. Very little is known, how symmetries affect the performance or reliability of such design (e.g. the earthquake resistance of buildings, electric systems, chemical processes). Even in simple models there are difficult problems leading to complicated analysis involving advanced algebraic and analytic method. My research area, the Equivariant Analysis, is focused on creating new tools (for example the equivariant degree) allowing effective and complete study of symmetric dynamical processes. My interests are two folded: theoretical and applied. In the theoretical part, based on the most recent achievements in various mathematical fields (such as algebraic and equivariant topology, transformation groups, algebra, differential geometry, differential equations, functional analysis, etc.), I am trying to understand the complex nature of abstract nonlinear symmetric equations, so it becomes possible to extract essential information about the solutions and their symmetric properties. This information leads to a development of new computational methods (involving algebraic, topological and analytical routines). In the applied part, we establish standard settings and create comprehensive routines, which allow usage of computers (e.g. Maple package was created for several groups of symmetries) in order to provide the user with quick and precise way to analyze dynamical systems, making our theoretical achievements accessible to applied mathematicians and even engineers. Our methods were used, for example, to investigate symmetric configurations of (electrical, chemical or biological) oscillators, in population models, or electrical transmission lines.