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: Complex numbers/matrix

  1. Feb 1, 2012 #1
    1. The problem statement, all variables and given/known data

    I'm part way through a problem and got the answer [tex] P_x=c_+^* c_-+c_-^*c_+ [/tex].
    But the answer should be [tex] 2Re(c+^*c_-) [/tex].

    Are the two equivalent?

    2. Relevant equations

    [tex] c+c^*=2Re(c) [/tex]
  2. jcsd
  3. Feb 2, 2012 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    That depends. Is c-*·c+ equal to (c+*·c-)* ? If so, then you can apply:
  4. Feb 2, 2012 #3
    Just complex conjugate on of the both terms
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook