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Abstract The interaction of light with matter is extremely rich. In chemistry and biology, the photon is used as a reagent in a wide range of preparative and analytical scientific developments. As this seminar will illustrate, however, the use of photons …

Abstract In the inter-war period, the universalist legacy of the Enlightenment was not confined to the colonialist discourse advocating Europe' s civilizing mission . It was used in other ways, from a European perspective, to defend democracy, oppose …

Abstract From childhood through to research, the back-and-forth between concrete problems and abstraction enables the discovery and understanding of new mathematical concepts. In practice, it's difficult to extend the manipulative approaches deployed in …

Abstract Unlike the book, the letter implies a particular situation of writing and enunciation, as well as circumstances of reading: as soon as the envelope is opened, the recipient is transformed into a reader, the text into an event and its message into …

Abstract Poussin's painting Les Bergers d'Arcadie does not require us to choose between contradictory interpretations: they are all valid in the same way as optical illusions whose interpretation and referent change depending on whether we structure the …

Abstract In the Middle East, water is and always has been a fundamental element in the development of human societies. Studies of past civilizations and those of contemporary times complement and can feed into each other  : they also provide a better …

Abstract Since Régine Pernoud and Georges Duby, a tradition, whose influence extends beyond the historiographical framework, locates in the second half of the 12th   century, at the time of Hildegarde de Bingen and Eleanor of Aquitaine, a lost paradise of …

Abstract The oracle was expressed in the form of an enigma. It fell to a wise man to decipher it and make the encrypted message apparent. If history is the art of looking at the enigmas of the past and grasping their nature as much as the reasons that …

Philippe Portier: "States and religions in Europe: the weight of history" Stéphanie Hennette Vauchez: "The scope and limits of secularism in effective …

Writing as an underground temple where we crawl to consult an oracle in the darkness of the cave, the place of pre-writing. Become the pythia who enunciates an enigma to be submitted to the diviner who will decipher it. Past, present and future are …

Abstract The third lecture will discuss the Erdös-Ginzburg-Ziv Problem in discrete geometry, and show how (at least in high dimension) it can be reformulated as a problem in F_p^n. Specifically, this leads to the question of asking about the maximum …

Abstract From biocatalysts such as enzymes, to therapeutic targets and drugs such as membrane proteins and antibodies, various classes of proteins are manipulated outside their natural context. Stabilizing them is often a challenge. We will illustrate how …

Abstract The " chief merchant " of Mari was called Iddin-Numušda (often abbreviated to Iddiyatum). His archives, found in room 24 of the palace (which A. Parrot had mistaken for a school), allow us to draw up a portrait of him ; they show us in particular …