minpoly

Minimal polynomial of matrix

Syntax

minpoly(A)

minpoly(A,var)

>>syms x

>> A = [3 -3 2;-1 5 -2;-1 3 0]

>> minpoly(A, x)   

ans = a^2 - 6*a + 8

factor

Prime factors

Syntax

f = factor(n)

>>syms a

>> A = [3 -3 2;-1 5 -2;-1 3 0]

>> factor(det(a*eye(size(A)) - A))

ans = [ a - 4, a - 2, a - 2]