Research Interests

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I have always been interested in the mechanisms by which nature creates beautiful and complicated patterns and then develops them in front of our eyes. This led me to using analytical and topological methods for exploring invariant sets of non linear differential equations that are thought to govern some of these phenomena.

Nature, however, does not reveal itself  in the form of differential equations directly, but rather as a point cloud collected by the experimentalists. Today there is a tremendous amount of data but no universal method for understanding it. In my current research, I use methods of algebraic topology and the power of computers to analyze large and potentially high dimensional data sets. An integral part of my research is developing methods that allow a meaningful comparison of experimental and simulated data so that  the similarities as well as the differences between them can be better understood.

In order to fully appreciate the dynamical mechanisms of nature, we need to treat our data as a time series. We apply topological methods and the theory of dynamical systems to study these time series.  Often the most interesting dynamics happen in a subset of the space in which the point cloud is embedded. The dimension of this set tends to be much smaller than the dimension of the ambient space. This opens a door for reconstructing the dynamics from the data in a more manageable space. I'm interested in using topological tools such as Conley index to show  the existence of fixed points, periodic orbits and other invariant sets hidden in the experimental data.

Richard Feynman

To those who do not know mathematics it is difficult to get across a real feeling as to the beauty, the deepest beauty of nature . . . . If you want to learn about nature, to appreciate nature, it is necessary to understand the language that she speaks in.

Albert Einstein

Try and penetrate with our limited means the secrets of nature and you will find that, behind all the discernible concatenations, there remains something subtle, intangible and inexplicable. Veneration for this force beyond anything that we can comprehend is my religion. To that extent I am, in point of fact, religious.