That is because is supposed to be a unit vector, so . Therefore .
Hello!
I've got a question according the solution of this exercise
Show that , where
is the biggest eigenvalue
and
SOLUTION
is positive definit, so there is a unitary
" alt="UA^*AU^{-1} = diag (E_1, ... , E_n )=" /> and denote the eigenvalues of
So
So why is the last line? Why is it not ?
Rapha