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Saw Seminar Mathematical practices in the context of the astral sciences14th February 2014, 9.30 am-5.30pmUniversité Paris DiderotThe mathematics related to the design and use of instruments: “Astronomical instruments, gnomon, shadow square, quadrant, armillary sphere” Matthieu Ossendrijver (Humboldt Universität)The Mesopotamian Gnomon as a Mathematical DeviceKarine Chemla (SAW ERC Project, SPHERE)Mathematical approaches to the gnomon in ancient ChinaHirose Sho (SAW ERC Project, SPHERE)A beginner’s guide for using the gnomon with Examples, by Paramesvara in his GoladipikaCommentator: Agathe Keller (SAW ERC Project, SPHERE) Matthieu Husson (SAW ERC Project, SPHERE)The uses and design of Diurnal motion observation instruments’ according to John of Lignières (Paris 14th c.).Bâtiment/Building Condorcet, Room/Salle 483A 4 rue Elsa Morante 75013 Paris or 10 rue Alice Domon et Léonie Duquet 75013 ParisProgramme and Map