By Thibault Damour, Olivier Darrigol, Vincent Rivasseau

The Poincaré Seminar is held two times a yr on the Institute Henri Poincaré in Paris. The objective of this seminar is to supply updated information regarding basic subject matters of serious curiosity in physics. either the theoretical and experimental effects are lined, with a few old historical past. specific care is dedicated to the pedagogical nature of the presentation. This quantity is dedicated to Einstein's 1905 papers and their legacy. After a presentation of Einstein's epistemological method of physics, and the genesis of distinct relativity, a centenary point of view is out there. The geometry of relativistic spacetime is defined intimately. unmarried photon experiments are provided, as a miraculous awareness of Einstein's mild quanta speculation. A formerly unpublished lecture through Einstein, which provides an illuminating standpoint on statistical physics in 1910, on the sunrise of quantum mechanics, is reproduced. the amount ends with an essay at the historic, actual and mathematical points of Brownian movement.