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Yeah, it is Number Theory!

  1. Jan 25, 2014 #1
    How does one show that a prime element in a Ring is irreducible and how does one show that ##|| x || = 1## iff x is a unit.

    okay from my knowledge I know that units are invertible elements, so how does the norm of x make it 1... maybe I am not too sure about this
    Last edited by a moderator: Jan 25, 2014
  2. jcsd
  3. Jan 27, 2014 #2


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    For your first question, try doing a proof by contradiction. Let p be a prime element, and suppose it is reducible. What can you do with that?
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