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: Real Analysis Proof

  1. Dec 11, 2009 #1
    Prove or disprove that if m and n are integers such that mn = 1 then either m= 1 & n = 1 or else m = -1 & n = -1.
  2. jcsd
  3. Dec 11, 2009 #2
    What have you already tried and where are you stuck?

  4. Dec 11, 2009 #3
    Have you tried to find any counterexamples? Usually that will either disprove the statement or give you a reason why no such counterexamples exist.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook