Exercises
[11D]Let \({\mathcal L}(X,Y)\) be the space of all continuous linear applications. Show that \(\| β \| _{X,Y}\) is a norm in \({\mathcal L}(X,Y)\).
[11D]Let \({\mathcal L}(X,Y)\) be the space of all continuous linear applications. Show that \(\| β \| _{X,Y}\) is a norm in \({\mathcal L}(X,Y)\).