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证明 \dot y = y^2 , y(0) = y_0 > 0 在有限时间 爆炸。用 Osgood 准则确认。
证明 \dot y = y^2 , y(0) = y_0 > 0 在有限时间 爆炸。用 Osgood 准则确认。
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