1
$\begingroup$

$E$ is an orthogonal projection on a subspace $W$ of $V$ (please explain what that means), and $k>0$. Prove that $kI+E$ is positive definite. Thanks!

  • 1
    Maybe you should think about how to answer your main question here _after_ you understand the meanings of those two terms. You might find you're then able to answer that main question without any help.2012-10-26
  • 0
    Couldn't find anything on orthogonal projection which helped me solve this exercise.2012-10-26

2 Answers 2