寓言
发表于 2025-3-21 18:31:42
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Anhydrous
发表于 2025-3-21 23:19:48
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消毒
发表于 2025-3-22 01:19:11
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ascetic
发表于 2025-3-22 05:58:37
s of the scientific community by showing simple ways of exprAlthough this may seem a paradox, all exact science is dominated by the idea of approximation. Bertrand Russell (1872-1970) Most natural optimization problems, including those arising in important application areas, are NP-hard. Therefore,
压碎
发表于 2025-3-22 11:38:27
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苦恼
发表于 2025-3-22 15:35:22
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歌剧等
发表于 2025-3-22 18:14:20
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BADGE
发表于 2025-3-23 01:16:41
https://doi.org/10.1007/978-3-8350-9498-7on 2.1 we deferred giving the lower bounding method on which this algorithm was based. We will provide the answer below. The power of this approach will become apparent when we show the ease with which it extends to solving several generalizations of the set cover problem (see Section 13.2).
Silent-Ischemia
发表于 2025-3-23 05:23:09
Steiner Tree and TSP case. For TSP, without this restriction, the problem admits no approximation factor, assuming . ≠ .. The algorithms, and their analyses, are similar in spirit, which is the reason for presenting these problems together.
溃烂
发表于 2025-3-23 05:50:26
-Centerr the restriction that the edge costs satisfy the triangle inequality. Without this restriction, the .-center problem cannot be approximated within factor .(.), for any computable function .(.), assuming . ≠ . (see Exercise 5.1).