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期刊论文
On Number of Circles Intersected by a Line1
Journal of Combinatorial Theory, Series A 98, 395-405(2002)，-0001，（）：
Consider a set U of circles in the plane such that any line intersects at least one of those circles. For a given natural number m, is there a line in the plane intersecting at least m circles in U? In this paper this problem is solved. Our result is also generalized to compact convex subsets and to higher dimensional cases.
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