Classification of spherical 2-distance {4,2,1}-designs by solving Diophantine equations

Eiichi Bannai, Etsuko Bannai, Ziqing Xiang, Wei-Hsuan Yu, and Yan Zhu
Taiwanese Journal of Mathematics 25(1) (2021), 1–22

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Prepared September 2026 · 論文導讀,不作最新最佳上界的宣稱。