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v2007.09.13 - Convex Optimization

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CONVEX OPTIMIZATION & EUCLIDEAN DISTANCE GEOMETRY 117.4 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 477A Linear algebra 479A.1 Main-diagonal δ operator, λ , trace, vec . . . . . . . . . . . . 479A.2 Semidefiniteness: domain of test . . . . . . . . . . . . . . . . . 483A.3 Proper statements . . . . . . . . . . . . . . . . . . . . . . . . . 486A.4 Schur complement . . . . . . . . . . . . . . . . . . . . . . . . 498A.5 eigen decomposition . . . . . . . . . . . . . . . . . . . . . . . . 502A.6 Singular value decomposition, SVD . . . . . . . . . . . . . . . 505A.7 Zeros . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 510B Simple matrices 517B.1 Rank-one matrix (dyad) . . . . . . . . . . . . . . . . . . . . . 518B.2 Doublet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 523B.3 Elementary matrix . . . . . . . . . . . . . . . . . . . . . . . . 524B.4 Auxiliary V -matrices . . . . . . . . . . . . . . . . . . . . . . . 526B.5 Orthogonal matrix . . . . . . . . . . . . . . . . . . . . . . . . 531C Some analytical optimal results 535C.1 properties of infima . . . . . . . . . . . . . . . . . . . . . . . . 535C.2 diagonal, trace, singular and eigen values . . . . . . . . . . . . 536C.3 Orthogonal Procrustes problem . . . . . . . . . . . . . . . . . 542C.4 Two-sided orthogonal Procrustes . . . . . . . . . . . . . . . . 544D Matrix calculus 549D.1 Directional derivative, Taylor series . . . . . . . . . . . . . . . 549D.2 Tables of gradients and derivatives . . . . . . . . . . . . . . . 570E Projection 579E.1 Idempotent matrices . . . . . . . . . . . . . . . . . . . . . . . 582E.2 I − P , Projection on algebraic complement . . . . . . . . . . . 587E.3 Symmetric idempotent matrices . . . . . . . . . . . . . . . . . 588E.4 Algebra of projection on affine subsets . . . . . . . . . . . . . 594E.5 Projection examples . . . . . . . . . . . . . . . . . . . . . . . 594E.6 Vectorization interpretation, . . . . . . . . . . . . . . . . . . . 601E.7 on vectorized matrices of higher rank . . . . . . . . . . . . . . 608E.8 Range/Rowspace interpretation . . . . . . . . . . . . . . . . . 612E.9 Projection on convex set . . . . . . . . . . . . . . . . . . . . . 612

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