A Remark on the Hopf invariant for Spherical 4-braids
Abstract
Akhmet’ev PM
An approach by J.Wu describes homotopy groups πn(S2) of the standard 2-sphere as isotopy classes of spherical n+1--strand Brunnian braids. The case n=3 is investigated for applications.
English 
Spanish 
Chinese 
German 
French 
Japanese 
Portuguese 
Hindi 