Time

This eleventh volume in the Poincaré Seminar Series describes recent research related to the mathematical, physical, experimental, or philosophical facets of the fascinating concept of Time. It contains the following chapters: - Thibault Damour, "Time and relativity"; - Cédric Villani, "(Ir)reversibility and entropy"; - Cédric Villani, "(Ir)réversilité et entropie"; - Christopher Jaryzinski, "Equalities and inequalities: Irreversibility and the second law of thermodynamics at the nanoscale"; - Christophe Salomon, "Time's measurement in the 21st century"; - Huw Price, "Time's arrow and Eddington's challenge"; - Jos Uffink and Giovanni Valente, "Time's arrow and Landford's theorem". This book should be of broad general interest to both physicists and mathematicians.