Geometry of Virus Structure
主 讲 人 ：Michel Deza
地 点 ：图书馆二楼报告厅
Since the discovery of molecule of C60 (truncated icosahedron), fullerenes,i.e., simple polyhedra with only pentagonal and hexagonal faces, became the main object in Organic Chemistry; the synthesis of C60 was marked by the Nobel prize 1996.
Crick and Watson's article in Nature, 10-3-1956, starts: "It is a striking fact that almost all small viruses are either rods or spheres."
In fact, all virions (i.e., "baby viruses" having a capsid body), except for most complex, as brick-like pox virus, and some enveloped ones, are helical or (about half of all known and almost all human ones) icosahedral: dual fullerenes with Ih or chiral I symmetry.
Caspar and Klug, Nobel prize 1982, gave quasi-equivalence principle: virion minimizes by organizing capsomers in minimal number of locations with non-eqvuivalent bonding, resulting in icosadeltahedral (dual icosahedral fullerene) structure.We give an up to date survey on geometries and symmetries of virion capsids and related mathematics. It will be an expository lecture.
Michel Deza, Ecole Normale Superieure, Paris，1980-2009, the Editor-in-Chief of "European Journal of Combinatorics".Currently, an Editorial Board member for 15 international mathematical journals; also edited about dozen of Special Issues of other journals and books.
Founding Fellow of Institute of Combinatorics and its Applications.Member of European Academy of Sciences; its Vice President 2008-2010,Member of International Academy of Mathematical Chemistry.