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!

Computing inner products in C

  1. May 25, 2009 #1
    1. The problem statement, all variables and given/known data x=(2,1+i,i) and y=(2-i,2,1+2i)



    2. Relevant equations



    3. The attempt at a solution um ok normally i would use <a,b>=|a||b|cos(theta). But these are complex numbers. I have no clue how to do this.
     
  2. jcsd
  3. May 25, 2009 #2

    Hurkyl

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Surely you have a definition to appeal to?

    (and I'm pretty sure that <a,b>=|a||b|cos(theta) isn't it -- and even if that equation were correct, it is rare that you'd actually want to use it to compute an inner product)
     
  4. May 25, 2009 #3

    D H

    User Avatar
    Staff Emeritus
    Science Advisor

    Suppose instead you were just working with real vectors -- say (2,20,2) and (10,1,1). There is no need to compute the angle between these vectors. There is a much easier way to do this. What is another way to compute the inner product that |a||b|cos(theta)? How would you generalize this to complex numbers?

    And finally, what is in your class notes and text? I am quite certain your instructor does not expect you to derive the formula for computing the inner product in C3. He or she expects you to use something you have already been taught.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Computing inner products in C
  1. Inner product on C(R) (Replies: 6)

  2. Inner Product (Replies: 13)

  3. Inner product (Replies: 4)

Loading...