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<WRAP tabs> *[[2015:videos:first_day_2015|6 July 2015]] *[[2015:videos:second_day_2015|7 July 2015]] *[[2015:videos:related_event|Public lecture]] </WRAP> ^ **Jean-Marc Lévy-Leblond** | //From relativity to chronogeometry. The twin paradox (re)$^n$visited and (finally?) tamed//| ^ {{ youtube>vjntmoIEF3o?large }}||