Explain why AA+ and A +A are projection matrices (and therefore symmetric). What
Chapter 6, Problem 6.3.22(choose chapter or problem)
Explain why AA+ and A +A are projection matrices (and therefore symmetric). What fundamental subspaces do they project onto?
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