Our working space is ℝ n . We recall that this space has the structure of a real vector space (its elements being called vectors), and also of an affine space (a set of points); the latter can be identified with the vector-space ℝ n whenever an origin is specified. It is not always possible, nor even desirable, to distinguish vectors and points.
KeywordsExtreme Point Convex Cone Convex Combination Tangent Cone Relative Interior
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