What's Les Lionnes? A math and computing course, 100% free of charge, including accommodation. From April 21 to 25, 20 high school girls, selected for their motivation and with a view to social diversity, will conduct research on open-ended problems in mathematics or computer science with scientists every morning. The afternoons will be devoted to fun, cultural and sporting activities, as well as inspiring encounters. NEW: you can make an appointment to meet by telephone, see below.