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v2007.09.13 - Convex Optimization

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441HS N h0EDM NK = S N h ∩ R N×N+Figure 109: Pseudo-Venn diagram from Figure 108 showing elbow placedin path of projection of H on EDM N ⊂ S N h by an optimization problemdemanding nonnegative input matrix H . The first two line segmentsleading away from H result from correct order-of-projection required toprovide nonnegative H prior to optimization. Were H nonnegative, then itsprojection on S N h would instead belong to K ; making the elbow disappear.(confer Figure 120)

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