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!

Homework Help: Properties of Eigenvalues

  1. Oct 27, 2011 #1
    1. The problem statement, all variables and given/known data
    I solved a problem that asked me to show that the sum of the eigenvalues of A+B equals the sum of all the individual eigenvalues of A and B, and similarly for products. I just would like to know why is this so...

    2. Relevant equations

    3. The attempt at a solution

    Is it because we're combining A and B?
  2. jcsd
  3. Oct 27, 2011 #2
    I forgot to mention A and B are 2 by 2 matrices
  4. Oct 27, 2011 #3


    Staff: Mentor

    Since you solved this problem, then you should know why this is so.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook