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Linear spaces and partitioning the projective plane

机译:线性空间和投影平面的划分

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The aim of this paper is to settle a question about the partitioning of the projective plane by lines except for a small set. Suppose that Q is a set of points in the projective plane of order n and Pi is a set of lines that partitions the complement of Q. If Q has at most 2n - 1 points and P has less than n + 1 + root n lines, then these lines are concurrent. An example is given which shows that the condition on the number of points of Q is sharp. However, it turns out that this is a 'pathological' example and if we exclude this case, then the statement can be improved. (C) 1997 Academic Press.
机译:本文的目的是解决关于投影平面除少数集合外的其他问题。假设Q是n阶投影平面上的一组点,Pi是划分Q补数的一组线。如果Q最多具有2n-1个点,并且P小于n + 1 +根n条线,那么这些行是并发的。给出一个例子,表明关于Q点数的条件是尖锐的。但是,事实证明,这是一个“病理性”示例,如果我们排除这种情况,则可以改进该语句。 (C)1997学术出版社。

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