Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

From what theorem does this technique come from?

  1. Oct 29, 2011 #1
    The attached image is from "Quantum Mechanics: A self contained course" by Atkinson and Hounkonnou.

    I've seen this used a lot, and I know this is simple, but I still don't know the principle behind this. From what theorem does this method come from? Can someone give me something like a Wikipedia link please?

    Thanks.
     

    Attached Files:

    • 1.jpg
      1.jpg
      File size:
      10.2 KB
      Views:
      63
  2. jcsd
  3. Oct 29, 2011 #2
  4. Oct 29, 2011 #3
    Thanks!
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook