use Theorem 6.2 to determine whether W is a subspace of V.V Mnn, W {A in Mnn : AB BA}
Chapter 6, Problem 6.1.33(choose chapter or problem)
use Theorem 6.2 to determine whether W is a subspace of V.V Mnn, W {A in Mnn : AB BA}, where B is agiven (fixed) matrix
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer