four-vertex theorem
Sign in to savetheorem that every simple closed smooth curve in the plane has at least four points of locally extreme curvature
Connections
curve
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maxima and minima
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geometry
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International Standard Book Number
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circle
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real number
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mathematical proof
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radius
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digital object identifier
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ellipse
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continuous function
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JSTOR
Organization
tangent
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Q118398
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fundamental theorem of algebra
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multiplicative inverse
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if and only if
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convex set
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curvature
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norm
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