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Smooth spheres in ℝ4 with four critical points are standard

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Scharlemann, M. Smooth spheres in ℝ4 with four critical points are standard. Invent Math 79, 125–141 (1985). https://doi.org/10.1007/BF01388659

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  • DOI: https://doi.org/10.1007/BF01388659

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