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arXiv 0910.5945math.CO
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Sylvester四点问题的组合形式

A combinatorial version of Sylvester's four-point problem

Gregory S. Warrington

摘要:

西尔维斯特的四点问题要求在平面上随机均匀选择的四个点有一个三角形作为它们的凸包的概率。使用组合分类点在平面上由于古德曼和波拉克,我们推广西尔维斯特的问题,涉及减少表达式的长字在对称群。我们猜想这个新版本的问题的答案是1/4。

英文摘要:

J. J. Sylvester's four-point problem asks for the probability that four points chosen uniformly at random in the plane have a triangle as their convex hull. Using a combinatorial classification of points in the plane due to Goodman and Pollack, we generalize Sylvester's problem to one involving reduced expressions for the long word in the symmetric group. We conjecture an answer of 1/4 for this new version of the problem.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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