This might help ....
Let λ be eighen value
Characteristic polynomial is
(1-λ)(-1-λ)(i-λ)(-i-λ)
=(λ^{2}-1)(λ^{2}+1)
=λ^{4}-1
Characteristic equation is λ^{4}-1=0
According to Cayley Hamilton theorem every matrix matrix satisfies its own characteristic equation
So A^{4}=I
Gatecse
Let's say |c| = 5 and |p| = ...
The fact is to improve the maximum ...