Exercises
[11C]Note that if \(X\) has finite dimension then every linear application is continuous, and
\[ \| A\| _{X,Y}= \max _{x∈ X~ ,~ \| x\| _ X≤ 1} \| Ax\| _ Y~ ~ . \]
[11C]Note that if \(X\) has finite dimension then every linear application is continuous, and