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- W2128227281 abstract "We re-examine the notion of relative (p,ε)-approximations, recently introduced in Cohen et al. (Manuscript, 2006), and establish upper bounds on their size, in general range spaces of finite VC-dimension, using the sampling theory developed in Li et al. (J. Comput. Syst. Sci. 62:516–527, 2001) and in several earlier studies (Pollard in Manuscript, 1986; Haussler in Inf. Comput. 100:78–150, 1992; Talagrand in Ann. Probab. 22:28–76, 1994). We also survey the different notions of sampling, used in computational geometry, learning, and other areas, and show how they relate to each other. We then give constructions of smaller-size relative (p,ε)-approximations for range spaces that involve points and halfspaces in two and higher dimensions. The planar construction is based on a new structure—spanning trees with small relative crossing number, which we believe to be of independent interest. Relative (p,ε)-approximations arise in several geometric problems, such as approximate range counting, and we apply our new structures to obtain efficient solutions for approximate range counting in three dimensions. We also present a simple solution for the planar case." @default.
- W2128227281 created "2016-06-24" @default.
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- W2128227281 date "2010-02-18" @default.
- W2128227281 modified "2023-10-02" @default.
- W2128227281 title "Relative (p,ε)-Approximations in Geometry" @default.
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- W2128227281 doi "https://doi.org/10.1007/s00454-010-9248-1" @default.
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