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arXiv 1106.0237cs.AI
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在有反馈的因果图中从d-分离推导条件独立性(研究笔记)

On Deducing Conditional Independence from d-Separation in Causal Graphs with Feedback (Research Note)

University of Toronto(多伦多大学)

R. M. Neal

摘要:

Pearl和Dechter(1996)声称,无环因果网络中条件独立的d-分离准则也适用于具有反馈环的离散变量网络,只要系统的变量由随机干扰唯一确定。我通过例子表明,这是不正确的一般。需要一些比唯一性更强的条件,例如保证导致唯一解的因果动力学的存在。

英文摘要:

Pearl and Dechter (1996) claimed that the d-separation criterion for conditional independence in acyclic causal networks also applies to networks of discrete variables that have feedback cycles, provided that the variables of the system are uniquely determined by the random disturbances. I show by example that this is not true in general. Some condition stronger than uniqueness is needed, such as the existence of a causal dynamics guaranteed to lead to the unique solution.

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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