Star domain
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In mathematics, a set
Star domain - Wikipedia Jump to content From Wikipedia, the free encyclopedia Property of point sets in Euclidean spaces "Star-shaped" redirects here. For the Blur documentary, see Starshaped . A star domain (equivalently, a star-convex or star-shaped set) is not necessarily convex in the ordinary sense. An annulus is not a star domain. In geometry , a set S {\displaystyle S} in the Euclidean space R n {\displaystyle \mathbb {R} ^{n}} is called a star domain (or star-convex set , star-shaped set [ 1 ] or radially convex set ) if there exists an s 0 ∈ S {\displaystyle s_{0}\in S} such that for
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