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On Venn Diagrams and the Counting of Regions

by Branko Grunbaum (University of Washington)

This article originally appeared in:
College Mathematics Journal
November, 1984

Subject classification(s): Geometry and Topology | Plane Geometry
Applicable Course(s): 4.9 Geometry

Generalization of the fact that \(n^2-n+2\) is the maximum number of disjoint regions in the plane that can be formed by \(n\) circles using the basic set operations


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