"Lʹaddition to the Romans: a plate and pebbles!"

How did the Romans calculate? Thatʹs what Alain Schärlig, honorary professor at the University of Lausanne, and Jérôme Gavin, teacher at Collège Voltaire in Geneva, have tried to find out. The two mathematicians take us to the heart of an absolutely fascinating investigation in their latest book "Lʹaddition chez les romains: une plaque et des cailloux!"