Hi, I have a few questions on PS5. 1. S4.1 P9: I got the right blanks, but I don't understand why we can make the conclusion. 2. S4.1 P33: The solution doesn't show how to get nullspace and left nullspace. If {r1,r2} and {c1,c2} each contain linearly independent vectors, isn't the r=m=n, and therefore only zero vectors in nullspace and left nullspace (b/c no free variables)? How can {n1,n2} and {l1,l2} be non-zero vectors? S4.2 P34: I get everything in the solution up until it says that AB is rxr. Shouldn't it be mxn? Even if A=B', AB=nxn. How can we say AB is rxr? Thanks in advance!!
Could you clarify where these problems can be found, or better yet, post the original questions themselves?
All of the problems can be found on Strang's linear algebra course, assignments, problem set #5. I'm also attaching copies of the problem here.
hi,I have the same question with you. Thus,I think the answer should be dependent
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