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v2010.10.26 - Convex Optimization

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v2010.10.26 - Convex Optimization

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10 CONVEX OPTIMIZATION & EUCLIDEAN DISTANCE GEOMETRY3.7 <strong>Convex</strong> matrix-valued function . . . . . . . . . . . . . . . . . . 2623.8 Quasiconvex . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2693.9 Salient properties . . . . . . . . . . . . . . . . . . . . . . . . . 2714 Semidefinite programming 2734.1 Conic problem . . . . . . . . . . . . . . . . . . . . . . . . . . . 2744.2 Framework . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2844.3 Rank reduction . . . . . . . . . . . . . . . . . . . . . . . . . . 2994.4 Rank-constrained semidefinite program . . . . . . . . . . . . . 3084.5 Constraining cardinality . . . . . . . . . . . . . . . . . . . . . 3334.6 Cardinality and rank constraint examples . . . . . . . . . . . . 3534.7 Constraining rank of indefinite matrices . . . . . . . . . . . . . 3844.8 <strong>Convex</strong> Iteration rank-1 . . . . . . . . . . . . . . . . . . . . . 3905 Euclidean Distance Matrix 3955.1 EDM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3965.2 First metric properties . . . . . . . . . . . . . . . . . . . . . . 3975.3 ∃ fifth Euclidean metric property . . . . . . . . . . . . . . . . 3975.4 EDM definition . . . . . . . . . . . . . . . . . . . . . . . . . . 4025.5 Invariance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4345.6 Injectivity of D & unique reconstruction . . . . . . . . . . . . 4395.7 Embedding in affine hull . . . . . . . . . . . . . . . . . . . . . 4455.8 Euclidean metric versus matrix criteria . . . . . . . . . . . . . 4505.9 Bridge: <strong>Convex</strong> polyhedra to EDMs . . . . . . . . . . . . . . . 4585.10 EDM-entry composition . . . . . . . . . . . . . . . . . . . . . 4655.11 EDM indefiniteness . . . . . . . . . . . . . . . . . . . . . . . . 4685.12 List reconstruction . . . . . . . . . . . . . . . . . . . . . . . . 4765.13 Reconstruction examples . . . . . . . . . . . . . . . . . . . . . 4805.14 Fifth property of Euclidean metric . . . . . . . . . . . . . . . 4866 Cone of distance matrices 4976.1 Defining EDM cone . . . . . . . . . . . . . . . . . . . . . . . . 4996.2 √Polyhedral bounds . . . . . . . . . . . . . . . . . . . . . . . . 5016.3 EDM cone is not convex . . . . . . . . . . . . . . . . . . . . 5026.4 EDM definition in 11 T . . . . . . . . . . . . . . . . . . . . . . 5036.5 Correspondence to PSD cone S N−1+ . . . . . . . . . . . . . . . 5116.6 Vectorization & projection interpretation . . . . . . . . . . . . 5176.7 A geometry of completion . . . . . . . . . . . . . . . . . . . . 522

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