In 1968 Henri Bacry and Jean-Marc Lévy-Leblond showed that the de Sitter group was the most general group compatible with isotropy, homogeneity and boost invariance.
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First proposed by Luigi Fantappiè in 1954, the theory remained obscure until it was rediscovered in 1968 by Henri Bacry and Jean-Marc Lévy-Leblond.
After a doctorate in Theoretical Physics at the université d’Orsay in 1965, he was successively in charge of research at CNRS, lecturer at the université de Nice, a professor at the Paris Diderot University, and at Nice, where he taught in the departments of physics, philosophy and communication.
The year 2005 also saw the release of Just Like Heaven, the adaptation by Dreamworks of Et si c'était vrai..., starring Reese Witherspoon and Mark Ruffalo.
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