Abstract
An approach by J. Wu describes homotopy groups $\pi_{\mathrm{n}}(\mathrm{S^2})$ of the standard 2-sphere as isotopy classes of spherical $n+1$-strand Brunnian braids. The case $n=3$ is investigated for applications.
Citation
P.M. Akhmet'ev. "A Remark on the Hopf invariant for Spherical 4-braids." J. Phys. Math. 5 (1) 1 - 5, 2014. https://doi.org/10.4172/2090-0902.1000124
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