[Compressive Sensing] Armijo's rule, trust region method, proof of Taylor theorem, Schur's lemma

Vector norms and matrix norms

$$ ||x||_2 \le ||x||_1 \le \sqrt{n}||x||_2 \le n||x||_{\infty} $$

$$ ||A||_2 \le ||A||_F \le ||A||_* \le \sqrt{r}||A||_F \le r ||A||_2 $$

Armijo's rule (Line search) + Trust region method

Proof of Taylor theorem 

Proof of Schur's lemma (Spectral theorem)

치팅 페이퍼 1,2