1. Not finding help here? Sign up for a free 30min 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!

Numerical linear Albebra

  1. Feb 4, 2007 #1
    1. The problem statement, all variables and given/known data

    In Matlab,

    Find the scalar (lamda) for which x+(lamda)v equals the solution obtained with the backslash operator \. Hence, x=B\b in matlab

    (This is another way of finding the inverse inv(B)... we could also use x=B\b)

    2. Relevant equations

    We have Bx = b

    B =
    [-1 2 -3
    0 4 1
    3 -6 9]

    b = [-12 -1 36]

    Null space v=[-14 -1 4]

    x = [-12.0000, -0.2143, -0.1429] <--- from B\b in matlab

    3. The attempt at a solution

    B*(x + (lamda)v) = b
    Bx + (lamda)Bv = b

    since v is the null space (lamda)Bv=0

    therefore, (lamda) could be anything?

    Is that correct?
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you help with the solution or looking for help too?

Similar Discussions: Numerical linear Albebra
  1. Numerical methods (Replies: 0)

  2. Linear Maps (Replies: 0)