 | Коллоквиум лаборатории Чебышева: Roman Mikhailov (Moscow) "A combinatorial description of homotopy groups of spheres" |
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Коллоквиум лаборатории Чебышева 14-го июня.  The talk is about group theoretical description of homotopy groups of spheres. For every n>k>2, we construct a group G by explicit generators and relators such that the center of G is isomorphic to the n-th homotopy group of the k-dimensional sphere. |