1 research outputs found
Online Class Cover Problem
In this paper, we study the online class cover problem where a (finite or
infinite) family of geometric objects and a set of red
points in are given a prior, and blue points from
arrives one after another. Upon the arrival of a blue point, the online
algorithm must make an irreversible decision to cover it with objects from
that do not cover any points of . The objective of the
problem is to place the minimum number of objects. When consists of
all possible translates of a square in , we prove that the
competitive ratio of any deterministic online algorithm is . On the other hand, when the objects are all possible translates of a
rectangle in , we propose an -competitive
deterministic algorithm for the problem.Comment: 27 pages, 23 figure