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!

Matrix-simple problem

  1. Nov 30, 2005 #1
    |F1| |K11 K12 K13| |U1|
    |F2| = |K21 K22 K23| * |U2|
    |F3| |K31 K32 K33| |U3|

    I have the above matrix relating F K AND U .

    In this F & k are known but u is unknown

    Suppose i know U(i) is equal to 0 can i eliminate the ith row and jth column of the K matrix and solve the remaining. How this can be understood.
  2. jcsd
  3. Nov 30, 2005 #2


    User Avatar
    Science Advisor
    Homework Helper

    You can understand it this way. Your matrix system represents a set of n linear equations in n unknowns. If the value of one of the unknowns is "discovered" then you need only n-1 equations to resolve the remaining unknowns. Obviously, the column corresponding to the resolved value can be eliminated if the value is 0. You get to pick which of the two remaining equations to keep.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Matrix-simple problem
  1. Matrix problem (Replies: 3)

  2. Matrix Problem (Replies: 4)

  3. Matrix problem (Replies: 4)