The Whitehead Square of the 6-point 2-sphere
暂无分享，去创建一个
We describe a model of the Whitehead square [ι 2, ι 2] ∈ π3(S 2) in the form of an order-preserving map from a 56-point model of S 3 into the minimal model of S 2 in the category of finite posets. The simplicity of the model enables the map to be visualised.
[1] E. Spanier. THE THEORY OF CARRIERS AND S-THEORY , 1962 .
[2] D. Cohen. Products and Carrier Theory , 1957 .
[3] M. McCord. Singular homology groups and homotopy groups of finite topological spaces , 1966 .
[4] J. Whitehead,et al. On Adding Relations to Homotopy Groups , 1941 .