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Author:Kojiro Shojima, Ph.D.

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  • 二次曲線と離心率
  • サイクロイド
  • 等積変形2
  • sine-wave
  • standingwave-reflection-free

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  • 穴開け
  • 野球のボールは正八面体
  • カージオイド3
  • サイクロイド
  • 平行四辺形に条件を加える
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