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: When are two extensions of this form isomorphic?

  1. Oct 12, 2012 #1
    Hello everyone,

    I've come across this homework problem in an algebra course:

    I have the first part more or less squared away after looking at the solutions book. However, the solution given for the second part confuses me. I can follow all of the logic until the final part, underlined:
    My questions are:
    (1) Where is the very strong iff coming from?
    (2) What is the motivation for wanting an arbitrary square in b? Doesn't this approach leave the question unanswered, since it deals with only a subset of possible choices for b?
     
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted