5. Let S be the set of all points (x11, X12, X13, X22, x23; X33) E K® such that the matrix x11 *12 x13 *12 T22 X23 T13 223 r33 is positive semidefinite. Is the set S convex? Justify your answer.
5. Let S be the set of all points (x11, X12, X13, X22, x23; X33) E K® such that the matrix x11 *12 x13 *12 T22 X23 T13 223 r33 is positive semidefinite. Is the set S convex? Justify your answer.
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter3: Matrices
Section3.5: Subspaces, Basis, Dimension, And Rank
Problem 66EQ
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