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arXiv 0911.3633cs.LGmath.COmath.GTstat.ML
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样本压缩的几何方法

A Geometric Approach to Sample Compression

University of California(加利福尼亚大学);University of Melbourne(墨尔本大学)

Benjamin I. P. Rubinstein, J. Hyam Rubinstein

摘要:

Littlestone和Warranty的样本压缩猜想在过去的二十年里一直没有得到解决。本文提出了一个系统的几何调查的有限最大概念类的压缩。双曲空间中超平面的简单排列和分段线性超平面排列都表示极大类,推广了相应的欧几里德结果。一个主要的结果是,PL安排可以扫过一个移动的超平面,以未标记的d-压缩任何有限的最大类,形成一个剥离计划,由Kuzmin和Warfarin的。一个推论是,对于任何常数k,某些d-极大类不能嵌入到任何VC维d+k的最大类中。PL扫描的构造涉及Pachner在一包含图上的移动,对应于超平面穿过d个其他超平面的交叉的移动。这扩展了著名的Pachner移动三角形的三次复形。

英文摘要:

The Sample Compression Conjecture of Littlestone & Warmuth has remained unsolved for over two decades. This paper presents a systematic geometric investigation of the compression of finite maximum concept classes. Simple arrangements of hyperplanes in Hyperbolic space, and Piecewise-Linear hyperplane arrangements, are shown to represent maximum classes, generalizing the corresponding Euclidean result. A main result is that PL arrangements can be swept by a moving hyperplane to unlabeled d-compress any finite maximum class, forming a peeling scheme as conjectured by Kuzmin & Warmuth. A corollary is that some d-maximal classes cannot be embedded into any maximum class of VC dimension d+k, for any constant k. The construction of the PL sweeping involves Pachner moves on the one-inclusion graph, corresponding to moves of a hyperplane across the intersection of d other hyperplanes. This extends the well known Pachner moves for triangulations to cubical complexes.

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