is a norm on .
Define the co-norm of the linear transformation to be
Prove that if is invertible with inverse then .
(I think probably we need to do something with the norm, but I still can't get it... So thank you.)
is a norm on .
Define the co-norm of the linear transformation to be
Prove that if is invertible with inverse then .
(I think probably we need to do something with the norm, but I still can't get it... So thank you.)