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  • Wiper

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  • 円柱貫通体(3本)

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  • 円柱貫通体(2本)

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  • 赤い点はどれも単振動してるだけ

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  • え?単振動だけ?

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  • Eigen values & Eigen vectors

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  • 4点を通る放物線

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  • Helicoid & Catenoid

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  • 3円柱貫通体

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  • f(x,y)=x y (x^2+y^2-1) の x^2+y^2<=2 での最大・最小

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  • 黒丸を動かして黒い矢印と赤い矢印が重なる所を探そう

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  • ベクトルの外積

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  • 平面上の1次変換

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  • A homotopy from (ab)c to a(bc)

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  • a homotopy from a a^{-1} to e_{x_0}

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  • a homotopy from f to g

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  • 円の面積

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  • max and min of x y(x^2+y^2-1) on x^2+y^2 <= 4

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  • max and min of y(x^2+xy+y^2-1) on 4x^2+4xy+3y^2<=1

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  • 3次元での回転

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  • Poo

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  • Group law on a cubic curve

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  • Quadratic surface

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  • Partial Derivative

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