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What and Who
Title:Independent set of convex polygons: from n^eps to 1+eps via shrinking
Speaker:Andreas Wiese
coming from:Max-Planck-Institut für Informatik - D1
Speakers Bio:
Event Type:AG1 Mittagsseminar (own work)
Visibility:D1, MMCI
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Level:AG Audience
Language:English
Date, Time and Location
Date:Thursday, 28 April 2016
Time:13:00
Duration:20 Minutes
Location:Saarbrücken
Building:E1 4
Room:024
Abstract
In the Independent Set of Convex Polygons problem we are given a set of weighted convex polygons in the plane and we want to compute a maximum weight subset of non-overlapping polygons. This is a very natural and well-studied problem with applications in many different areas. Unfortunately, there is a very large gap between the known upper and lower bounds for this problem. The best polynomial time algorithm we know has an approximation ratio of n^epsilon and the best known lower bound shows only strong NP-hardness.

In this paper we close this gap completely, assuming that we are allowed to shrink the polygons a little bit, by a factor 1-delta for an arbitrarily small constant delta>0, while the compared optimal solution cannot do this (resource augmentation). In this setting, we improve the approximation ratio from n^epsilon to 1+epsilon which matches the above lower bound that still holds if we can shrink the polygons.

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Name(s):Andreas Wiese
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Created by:Andreas Wiese, 04/21/2016 03:58 PMLast modified by:Uwe Brahm/MPII/DE, 11/24/2016 04:13 PM
  • Andreas Wiese, 04/21/2016 03:58 PM -- Created document.