Happy Ending problem
Sign in to saveproblem about proving that five points in the plane will have a subset forming the vertices of a convex quadrilateral
Connections
mathematics
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triangle
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International Standard Book Number
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integer
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polygon
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quadrilateral
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digital object identifier
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pentagon
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Paul Erdős
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heptagon
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Euclidean space
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JSTOR
Organization
Q118398
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conjecture
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binomial coefficient
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Stirling's approximation
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Catalan number
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big O notation
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complete graph
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MathWorld
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