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Linear Algebra and Learning from Data

Exercise 1.7.2

Answers

$S_{4}$ has two positive eigenvalues. Its first two leading determinants $D_{1}$ and $D_{2}$ are positive.
Let $x = (x_{1}, x_{2})$ , so $x^TS_1x = 5x^2_1 + 12x_1x_2 + 7x^2_2= (5x_1+7x_2)(x_1+x_2) 0 $. To make this less than zero, we let $x = (- 4, 3)$

niuers

2020-03-20 00:00

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