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Cosmology in the country of Georges Lemaître

A bit of history...

Georges Lemaître's legacy

Lemaitre.jpgModern cosmology, and especially the hot Big-Bang scenario, were born in Belgium about 85 years ago, after the 1927 paper by Georges Lemaître on the interpretation of galaxy radial velocities in terms of cosmic expansion.

Our group performs researches in modern cosmological problems deriving from Lemaître's interests: dark energy vs the cosmological constant, inflation vs the primeval atom, structure formation vs Lemaître's hesitating universe, relations between cosmology and philosophy, etc.

Cosmology at the  University of Namur

Our institution has been hosting scientific researches in General Relativity, Cosmology and related topics in Philosophy of Science for about 30 years.The continuous growing interest from graduate and undergraduate students, as well as financial support of research projects from FNRS lead to the creation in 2004 of a scientific group, GAMASCO, “Groupe d’Applications des MAthématiques aux SCiences du COsmos”.

naxys.jpgIn 2009, the Namur Center for Complex Systems (naXys) has been established as a new federative, multi-disciplinary research group gathering applied mathematicians, theoretical physicists, biologists and economists. Physical cosmology and mathematical aspects of gravitation now constitute one of the main research axis of the center naXys.

Cosmology and complex systems

Studying the Universe and its organizing interactions also lie in the field of complex systems, as do many present scientific challenges.

Tools for complex systems are also those of cosmology

This is rather obvious since the modern cosmological problems we are interested in, such as inflation, dark energy, dark matter, cosmic structure formation, fundamental nature of gravitation and the early universe require state-of-the-art mathematical, numerical and physical tools such as dynamical systems, mean field or effective theories, partial differential equations, numerical analysis, Monte Carlo or N-body simulations, etc. that are commonly used in complex systems science.

The Universe as a complex system

Describing the Universe as a physical and mathematical object also involve dealing with many different scales, chaotic dynamics and attracting regimes, critical phenomena and mathematics of phase transitions, intricate non-linear interactions, etc., all aspects that are required to understand the cosmic emergence of complexity.

We invite you to go along these pages to discover who we are and what we do...