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A topological proof of Grushko's theorem on free products

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References

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    Grushko, I.: On the bases of a free product of groups. Mat. Sbornik8, 169–182 (1940).

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    Stallings, J.R.: Some topological proofs and extensions of Gruško's theorem. Thesis Princeton University 1959.

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    Stallings, J.R.: Manifolds whose fundamental groups are free products (to appear).

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    Wagner, D.H.: On free products of groups. Trans. Amer. Math. Soc.84, 352–378 (1957).

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Stallings, J.R. A topological proof of Grushko's theorem on free products. Math Z 90, 1–8 (1965). https://doi.org/10.1007/BF01112046

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Keywords

  • Free Product
  • Topological Proof