Let A = XYT , where X is an m r matrix, YT is an r n matrix, and XTX and YT Y are both
Chapter 7, Problem 16(choose chapter or problem)
Let A = XYT , where X is an m r matrix, YT is an r n matrix, and XTX and YT Y are both nonsingular. Show that the matrix B = Y(YT Y) 1 (XTX) 1 XT satisfies the Penrose conditions and hence must equal A+. Thus A+ can be determined from any factorization of this form.
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