Segre proved that a smooth cubic surface over Q is unirational if and only if it has a rational point. We prove that the result also holds for cubic hypersurfaces over any field, including finite fields.
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Shandong Univ, Sch Math, Jinan 250100, Shandong, Peoples R ChinaShandong Univ, Sch Math, Jinan 250100, Shandong, Peoples R China
Liu, Jianya
Wu, Jie
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CNRS, UMR 7502, Inst Elie Cartan Lorraine, F-54506 Vandoeuvre Les Nancy, France
Univ Lorraine, Inst Elie Cartan Lorraine, UMR 7502, F-54506 Vandoeuvre Les Nancy, FranceShandong Univ, Sch Math, Jinan 250100, Shandong, Peoples R China
Wu, Jie
Zhao, Yongqiang
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Westlake Inst Adv Study, Shilongshan Rd, Hangzhou 310024, Zhejiang, Peoples R ChinaShandong Univ, Sch Math, Jinan 250100, Shandong, Peoples R China