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v2007.09.13 - Convex Optimization

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v2007.09.13 - Convex Optimization

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10 CONVEX OPTIMIZATION & EUCLIDEAN DISTANCE GEOMETRY4 Semidefinite programming 2254.1 Conic problem . . . . . . . . . . . . . . . . . . . . . . . . . . . 2264.2 Framework . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2344.3 Rank reduction . . . . . . . . . . . . . . . . . . . . . . . . . . 2474.4 Rank-constrained semidefinite program . . . . . . . . . . . . . 2565 Euclidean Distance Matrix 2895.1 EDM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2905.2 First metric properties . . . . . . . . . . . . . . . . . . . . . . 2915.3 ∃ fifth Euclidean metric property . . . . . . . . . . . . . . . . 2915.4 EDM definition . . . . . . . . . . . . . . . . . . . . . . . . . . 2965.5 Invariance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3265.6 Injectivity of D & unique reconstruction . . . . . . . . . . . . 3295.7 Embedding in affine hull . . . . . . . . . . . . . . . . . . . . . 3355.8 Euclidean metric versus matrix criteria . . . . . . . . . . . . . 3405.9 Bridge: <strong>Convex</strong> polyhedra to EDMs . . . . . . . . . . . . . . . 3485.10 EDM-entry composition . . . . . . . . . . . . . . . . . . . . . 3565.11 EDM indefiniteness . . . . . . . . . . . . . . . . . . . . . . . . 3585.12 List reconstruction . . . . . . . . . . . . . . . . . . . . . . . . 3665.13 Reconstruction examples . . . . . . . . . . . . . . . . . . . . . 3705.14 Fifth property of Euclidean metric . . . . . . . . . . . . . . . 3776 EDM cone 3876.1 Defining EDM cone . . . . . . . . . . . . . . . . . . . . . . . . 3896.2 Polyhedral bounds . . . . . . . . . . . . . . . . . . . . . . . . 3916.3√EDM cone is not convex . . . . . . . . . . . . . . . . . . . . 3936.4 a geometry of completion . . . . . . . . . . . . . . . . . . . . . 3956.5 EDM definition in 11 T . . . . . . . . . . . . . . . . . . . . . . 4006.6 Correspondence to PSD cone S N−1+ . . . . . . . . . . . . . . . 4096.7 Vectorization & projection interpretation . . . . . . . . . . . . 4146.8 Dual EDM cone . . . . . . . . . . . . . . . . . . . . . . . . . . 4196.9 Theorem of the alternative . . . . . . . . . . . . . . . . . . . . 4336.10 postscript . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4357 Proximity problems 4377.1 First prevalent problem: . . . . . . . . . . . . . . . . . . . . . 4457.2 Second prevalent problem: . . . . . . . . . . . . . . . . . . . . 4567.3 Third prevalent problem: . . . . . . . . . . . . . . . . . . . . . 467

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