1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Nullspace of A transpose x

  1. Mar 20, 2014 #1
    What does ATx=0 means?

    Does this notation means if A = [3,2;1,2;4,4], then, AT = [3,1,4;2,2,4]

    and ATx [x1;x2;x3] = 0?

    The nullspace of the transposed of the matrix A?
  2. jcsd
  3. Mar 20, 2014 #2


    Staff: Mentor

    This doesn't mean anything to me. I believe it should be written ATx = 0. ATx is the product of A transpose and some vector x.
  4. Mar 20, 2014 #3
    What significance is there if a question ask if it is consistent or inconsistent?
    ATx = 0
  5. Mar 20, 2014 #4


    Staff: Mentor

    My guess is they're asking whether the multiplication is defined. If x ##\in## R3, and A is as you have in post 1, then Ax is not defined, but ATx is defined.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Discussions: Nullspace of A transpose x
  1. Nullspace Question (Replies: 1)

  2. Nullspace of a matrix (Replies: 15)

  3. Nullspace matrix (Replies: 7)