Results 1 to 2 of 2

Math Help - Matrix Question

  1. #1
    Newbie
    Joined
    Oct 2009
    Posts
    2

    Matrix Question

    Doing second year econometrics and came across this question:

    Suppose A= I(subscribt t) - X(X'X)^-1.X' , where X is a T x k matrix

    Is A just a matrix of zeroes?
    Thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Newbie
    Joined
    Oct 2009
    Posts
    2
    Quote Originally Posted by jimmah View Post
    Doing second year econometrics and came across this question:

    Suppose A= I(subscribt t) - X(X'X)^-1.X' , where X is a T x k matrix

    Is A just a matrix of zeroes?
    Thanks
    Scatch that, now I think its just the identity matrix. Confused...
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Matrix Question
    Posted in the Advanced Applied Math Forum
    Replies: 6
    Last Post: July 21st 2010, 05:44 AM
  2. Matrix Question
    Posted in the Algebra Forum
    Replies: 3
    Last Post: July 1st 2009, 03:31 AM
  3. Matrix question
    Posted in the Advanced Algebra Forum
    Replies: 1
    Last Post: April 30th 2009, 06:11 PM
  4. matrix question.
    Posted in the Advanced Algebra Forum
    Replies: 0
    Last Post: April 30th 2009, 08:27 AM
  5. Matrix question....
    Posted in the Advanced Algebra Forum
    Replies: 0
    Last Post: August 29th 2005, 04:28 AM

Search Tags


/mathhelpforum @mathhelpforum