August 28th, 2017, 07:22 AM  #1 
Newbie Joined: Aug 2017 From: Tehran Posts: 1 Thanks: 0  Problem33
I don't quite understand bases in this question, since we expect column space to have 1 dimension and if it has 2 dimension, then there wouldnt be any N(A). Looking at explanation, I don't understand why dimensions should add up to 4? n=m=2 and we expect it to add up to 2. Would anyone please explain what's going on in this question?

August 28th, 2017, 08:20 AM  #2 
Global Moderator Joined: Dec 2006 Posts: 18,697 Thanks: 1525  