19.3.22 Linear Operators

Condition: Find the norm of the matrix operator \ (a: \ mathbb {r} _ {2}^{3} \ rightarrow \ mathb (r} {2}^{3} \) (in the Euclidean metric): \ [[[ A = \ Left (\ Begin {Array} {CCC} 15 & 0 & 0 & 9 &2 &2 &2 &2 & 3 \ END {Array} \ RIGHT) \]