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arXiv 1401.4602cs.GTcs.MA
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选举中的克隆:寻找可能的赢家

Cloning in Elections: Finding the Possible Winners

Edith Elkind, Piotr Faliszewski, Arkadii Slinko

摘要:

我们考虑通过克隆候选人操纵选举的问题。在我们的模型中,操纵器可以用几个克隆来替换每个候选者c,即,与c如此相似的新候选人,以至于每个投票人只需用连续排列的这些新候选人的块来替换他的投票中的c。所产生的选举的结果然后可以取决于克隆的数量以及每个投票者如何对块内的克隆进行排序。我们正式的克隆操作是成功的意味着什么(这原来是一个令人惊讶的微妙的问题),并为一些常见的投票规则,表征偏好配置文件,成功的克隆操作存在。我们还考虑了模型,其中有一个成本与生产每个克隆,并研究的复杂性,找到一个最低成本的克隆操作。最后,我们比较克隆与两个相关的问题:通过添加候选人的控制问题和可能的(共同)赢家时,新的替代品可以加入的问题。

英文摘要:

We consider the problem of manipulating elections by cloning candidates. In our model, a manipulator can replace each candidate c by several clones, i.e., new candidates that are so similar to c that each voter simply replaces c in his vote with a block of these new candidates, ranked consecutively. The outcome of the resulting election may then depend on the number of clones as well as on how each voter orders the clones within the block. We formalize what it means for a cloning manipulation to be successful (which turns out to be a surprisingly delicate issue), and, for a number of common voting rules, characterize the preference profiles for which a successful cloning manipulation exists. We also consider the model where there is a cost associated with producing each clone, and study the complexity of finding a minimum-cost cloning manipulation. Finally, we compare cloning with two related problems: the problem of control by adding candidates and the problem of possible (co)winners when new alternatives can join.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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