Show that $A$ is similar to a diagonal matrix iff $b=?iso-8859-1?Q?=3Dc=3Dd=3De=3Df=3Dg=3D0$_=96_math.stackexchange.com?=

Show that $A$ is similar to a diagonal matrix iff $b=c=d=e=f=g=0$ –
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Show that $A$ is similar to a diagonal matrix iff $$b=c=d=e=f=g=0$$ $$A=
\left(\begin{array}{cccc}a & b & c & d \\ 0 & a & e & f\\ 0 & 0 & a & g\\
0 & 0 & …