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v2010.10.26 - Convex Optimization

v2010.10.26 - Convex Optimization

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770 APPENDIX F. NOTATION AND A FEW DEFINITIONSfata fat matrix; meaning, more columns than rows:underdetermined[ ].AF(C ∋A)G(K)some set (calligraphic ABCDEFGHIJ KLMN OPQRST UVWX YZ)smallest face (171) that contains element A of set Cgenerators (2.13.4.2.1) of set K ; any collection of points and directionswhose hull constructs KL ν ν level set (555)L ν sublevel set (559)L ν superlevel set (644)A −1A †√√linverse of matrix AMoore-Penrose pseudoinverse of matrix Apositive square rootpositive l th rootA 1/2 and √ A A 1/2 is any matrix √ such that A 1/2 A 1/2 =A .For A ∈ S n + , A ∈ Sn+ is unique and √ A √ A =A . [55,1.2] (A.5.1.3)◦√DA= [√dij ] . (1347) Hadamard positive square root: D = ◦√ D ◦ ◦√ DEuler Fraktur ABCDEFGHIJKLMNOPQRSTUVWXYZL Lagrangian (507)Emember of elliptope E t (1097) parametrized by scalar tE elliptope (1076)EE ijelementary matrixmember of standard orthonormal basis for symmetric (59) or symmetrichollow (75) matrices

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