A Lower Bound on Blocking Semiovals
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Jeremy M. Dover
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Article
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2000
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Elsevier Science
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English
โ 87 KB
A semioval in a projective plane is a set S of points such that for every point P โ S, there exists a unique line of such that โฉ S = {P}. In other words, at every point of S, there exists a unique tangent line. A blocking set in is a set B of points such that every line of contains at least one poin