Perspectives on Multi-Level Dynamics

Abstract : As Physics did in previous centuries, there is currently a common dream of extracting generic laws of nature in economics, sociology, neuroscience, by focalising the description of phenomena to a minimal set of variables and parameters, linked together by causal equations of evolution whose structure may reveal hidden principles. This requires a huge reduction of dimensionality (number of degrees of freedom) and a change in the level of description. Beyond the mere necessity of developing accurate techniques affording this reduction, there is the question of the correspondence between the initial system and the reduced one. In this paper, we offer a perspective towards a common framework for discussing and understanding multi-level systems exhibiting structures at various spatial and temporal levels. We propose a common foundation and illustrate it with examples from different fields. We also point out the difficulties in constructing such a general setting and its limitations.
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Submitted on : Wednesday, October 26, 2016 - 9:39:40 AM
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Fatihcan Atay, Sven Banisch, Philippe Blanchard, Bruno Cessac, Eckehard Olbrich. Perspectives on Multi-Level Dynamics. The interdisciplinary journal of Discontinuity, Nonlinearity, and Complexity, 2016, 5, pp.313 - 339. ⟨10.5890/DNC.2016.09.009⟩. ⟨hal-01387733⟩

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