A Survey of Computations of Homotopy Groupes of Spheres and Cobordisms

Guozhen Wang Zhouli Xu

Algebraic Topology and General Topology mathscidoc:1912.43837

35, 2010.11
Among all the interesting spaces in topology, the spheres are no doubt beautiful objects and of most consideration since antiquity. Any nontrivial observations of them are of course very important. From the categorical point of view, we should not just focus on the objects themselves, but the morphisms between them as well. For this purpose, in algebraic topology, we do want to classify the set of continuous morphisms between spheres under the equivalent relation named homotopy, which describes a continuous deformation between two continuous maps. Let Sn be the n-sphere and k (X) be the set of homotopic equivalent based maps from Sk to X. For the reason that Sk is a double suspension when k 2, the set is actually an abelian group. A natural question is, what are these abelian groups?
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@inproceedings{guozhen2010a,
  title={A Survey of Computations of Homotopy Groupes of Spheres and Cobordisms},
  author={Guozhen Wang, and Zhouli Xu},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224210112802155401},
  pages={35},
  year={2010},
}
Guozhen Wang, and Zhouli Xu. A Survey of Computations of Homotopy Groupes of Spheres and Cobordisms. 2010. pp.35. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224210112802155401.
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