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Homotopy groups in categories

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References

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This research was partly supported by the U. S. Department of Army through its European Research Office.

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André, M. Homotopy groups in categories. Math Z 87, 299–313 (1965). https://doi.org/10.1007/BF01113200

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  • DOI: https://doi.org/10.1007/BF01113200

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