### Abstract

A circle C is occluded by a set of circles C1; : : : ;Cn if every line that intersects C also intersects at least one of the Ci; i = 1; : : : ; n. In this paper, we focus on determining the minimum number of circles that occlude a given circle assuming that all circles have radius 1 and their mutual distance is at least d. As main contribution of this paper, we present upper and lower bounds on this minimal number of circles for 2 =d =4, as well as the algorithms we used to derive them.

Original language | English |
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Title of host publication | Proceedings 20th Canadian Conference on Computational Geometry (CCCG'08, Montréal, Québec, Canada, August 13-15, 2008) |

Pages | 91-94 |

Publication status | Published - 2008 |

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## Cite this

Jovanovic, N., Korst, J. H. M., & Janssen, A. J. E. M. (2008). Minimum blocking sets of circles for a set of lines in the plane. In

*Proceedings 20th Canadian Conference on Computational Geometry (CCCG'08, Montréal, Québec, Canada, August 13-15, 2008)*(pp. 91-94)