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DTSTART:19700329T010000
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SUMMARY:Pure Mathematics Seminar: Oleg Karpenkov
DESCRIPTION:On finite and infinitesimal flexibility of discrete and semidiscrete surfaces \n\nIn this talk we discuss geometric, algebraic, and computational aspects of finite and infinitesimal flexibility of Kokotsakis meshes. A Kokotsakis mesh is a mesh that consists of a face in the middle and a certain band of faces attached to the middle face by its perimeter. In particular any (3×3)-mesh made of quadrangles is a Kokotsakis mesh. \n\nWe express the infinitesimal flexibility condition in terms of Ceva and Menelaus theorems. Further we study semi-algebraic properties of the set of flexible meshes and give equations describing it. For (3×3)-meshes we show flexibility conditions in terms of face angles. In conclusion we say a few words about semidiscrete case.
DTSTART:20131120T150000
DTEND:20131120T160000
LOCATION:A54, Postgraduate Statistics Centre Lecture Theatre
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