On the union of κ-round objects in three and four dimensions

Boris Aronov; Alon Efrat; Vladlen Koltun; Micha Sharir

On the union of κ-round objects in three and four dimensions

Boris Aronov^*, Alon Efrat, Vladlen Koltun, Micha Sharir

^*Corresponding author for this work

School of Computer Science

Research output: Contribution to conference › Paper › peer-review

Abstract

A compact body c in ℝ^d is κ-round if for every point p ∈ ∂c there exists a closed ball that contains p, is contained in c, and has radius κ diam c. We show that, for any fixed κ > 0, the combinatorial complexity of the union of n κ-round, not necessarily convex objects in ℝ³ (resp., in ℝ⁴) of constant description complexity is O(n^2+ε) (resp., O(n ^3+ε)) for any ε > 0, where the constant of proportionality depends on ε, κ, and the algebraic complexity of the objects. The bound is almost tight.

Original language	English
Pages	383-390
Number of pages	8
State	Published - 2004
Event	Proceedings of the Twentieth Annual Symposium on Computational Geometry (SCG'04) - Brooklyn, NY, United States Duration: 9 Jun 2004 → 11 Jun 2004

Conference

Conference	Proceedings of the Twentieth Annual Symposium on Computational Geometry (SCG'04)
Country/Territory	United States
City	Brooklyn, NY
Period	9/06/04 → 11/06/04

Keywords

Combinatorial complexity
Fat objects
Union of objects

Cite this

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AU - Aronov, Boris

AU - Efrat, Alon

AU - Koltun, Vladlen

AU - Sharir, Micha

PY - 2004

Y1 - 2004

N2 - A compact body c in ℝd is κ-round if for every point p ∈ ∂c there exists a closed ball that contains p, is contained in c, and has radius κ diam c. We show that, for any fixed κ > 0, the combinatorial complexity of the union of n κ-round, not necessarily convex objects in ℝ3 (resp., in ℝ4) of constant description complexity is O(n2+ε) (resp., O(n 3+ε)) for any ε > 0, where the constant of proportionality depends on ε, κ, and the algebraic complexity of the objects. The bound is almost tight.

AB - A compact body c in ℝd is κ-round if for every point p ∈ ∂c there exists a closed ball that contains p, is contained in c, and has radius κ diam c. We show that, for any fixed κ > 0, the combinatorial complexity of the union of n κ-round, not necessarily convex objects in ℝ3 (resp., in ℝ4) of constant description complexity is O(n2+ε) (resp., O(n 3+ε)) for any ε > 0, where the constant of proportionality depends on ε, κ, and the algebraic complexity of the objects. The bound is almost tight.

KW - Combinatorial complexity

KW - Fat objects

KW - Union of objects

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Y2 - 9 June 2004 through 11 June 2004

ER -

On the union of κ-round objects in three and four dimensions

Abstract

Conference

Keywords

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