Robert Aumann, Nobel Prize in Economics in 2005, has more than anyone else contributed to creating game theory as a unified field of research in the second half of the 20th century. The contributions in this volume, in their majority, come out of the Colloquium in Honor of Robert Aumann that was held October 11, 2021, at the University Paris-Panthéon-Assas on the occasion of Robert Aumann's receiving an honoris causa doctorate from the University Paris-Panthéon-Assas. The honoris causa ceremony took place the following day, October 12, in the Grand Amphithéâtre of Sorbonne University. Robert Aumann, Prix Nobel d'économie en 2005, a contribué plus que quiconque à faire de la théorie des jeux un domaine de recherche unifié durant la seconde moitié du xxe siècle. La majeure partie des contributions de ce numéro spécial a fait l'objet d'une communication lors du colloque organisé en son honneur, le 11 octobre 2021, à l'occasion de la remise, le lendemain, des insignes de doctorat honoris causa par l'Université Paris-Panthéon-Assas.
Aumann and Game Theory-Correlated Equilibrium in Games with Incomplete Information-Large Economies-Rational Dialogues- Common Knowledge in Game Theory-Subjectivity and Correlation in Randomized Strategies Revisited-Subjective Causality-An Ultra-An Ultra-Refined Grammar for Interactions : Thoughts on Robert Aumann's Philosophy of Game Theory