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"Four-vertex theorem" » "Four-vertex theorems", "Four-vortex theories", "Four-mertens theorem"

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by Berger, Marcel, Gostiaux, Bernard
Published 1988
Springer New York
Table of Contents: ... The Turning Number -- 9.5 The Turning Tangent Theorem -- 9.6 Global Convexity -- 9.7 The Four-Vertex Theorem...