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Inner radius

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Original – The circumradius (blue) and inner radius (green) of a set (dark red, with its convex hull shown as the lighter red dashed lines). The inner radius is smaller than the circumradius except for subsets of a single subset (a disc), for which they are equal.
Reason
Best illustration and perhaps the only illustration in the literature, which simply uses the definitions (without illustration). The distinction between inner radius and circumradius explains why the Shapley–Folkman–Starr theorem is an improvement over the Shapley–Folkman theorem.
Articles in which this image appears
Shapley–Folkman lemma
FP category for this image
Mathematics
Creator
David Eppstein
Categories: