Re: [math-fun] Matrix roots of polynomials

The context I've been asking about has the constant term of the polynomial be any constant matrix in whatever ring M is considered. << P(X) = X^k + A_(k-1) X^(k-1) + ... + A_1 X + A_0 (Not sure if this answers the question.) —Dan Allan Wechsler wrote: ----- When we say something like "X^2 + 1" does the 1 mean the identity matrix? In general, does a ring element in this context mean that ring element times the identity matrix? -----