# Massimo Fornasier : The projection method for dynamical systems and kinetic equations modelling interacting agents in high-dimension

In this talk we explore how concepts of high-dimensional data compression via random projections onto lower-dimensional spaces can be applied for tractable simulation of certain dynamical systems modeling complex interactions. In such systems, one has to deal with a large number of agents (typically millions) in spaces of parameters describing each agent of high dimension (thousands or more). Even with todayÂ?s powerful computers, numerical simulations of such systems are prohibitively expensive. We propose an approach for the simulation of dynamical systems governed by functions of adjacency matrices in high dimension, by random projections via Johnson-Lindenstrauss embeddings, and recovery by compressed sensing techniques. We show how these concepts can be generalized to work for associated kinetic equations, by addressing the phenomenon of the delayed curse of dimension, known in information-based complexity for optimal measure quantization in high dimension. This is a joint work with Jan Haskovec and Jan Vybiral.

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**Category**: Applied Math and Analysis**Duration**: 01:34:52**Date**: September 26, 2011 at 4:25 PM**Views**: 113-
**Tags:**seminar, Applied Math And Analysis Seminar

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