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Huber函数 L(x) = x^2/2 若 |x| <= 1 ； |x| - 1/2 否则。凸吗？在哪不连续？
Huber函数 L(x) = x^2/2 若 |x| <= 1 ； |x| - 1/2 否则。凸吗？在哪不连续？
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