𝐻₂ of the commutator subgroup of a knot group

$H_{2}$ of the commutator subgroup of a knot group
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by D. W. Sumners PDF

Proc. Amer. Math. Soc. 28 (1971), 319-320 Request permission

A short topological proof is given for the well-known theorem that if $G$ is a knot group and $G’$ its commutator subgroup, then ${H_2}(G’;Z) = 0$.

References

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