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Nullhomologous words in free groups which are not nullhomologous in any proper subgroup

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References

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  1. Albrecht Dold

    Present address: Mathematisches Institut, Universität Heidelberg, Im Neuenheimer Feld 288, D-6900, Heidelberg

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    1. Albrecht Dold
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    Dold, A. Nullhomologous words in free groups which are not nullhomologous in any proper subgroup. Arch. Math 50, 564–569 (1988). https://doi.org/10.1007/BF01193627

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