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What is this set represent?

  1. Mar 10, 2012 #1
    1. The problem statement, all variables and given/known data

    Show I' ideal in Zsqrt(d)
    Let I'=I intersection Z (where Z denotes the integers)
    I any ideal in Zsqrt(d)

    2. Relevant equations



    3. The attempt at a solution
    I think I' is just the set of integers in Z such that the integer is an ideal of zsqrt(d)
    But how is this ideal since if I left or right multiply any element of zsqrt(d) with an element in I' I get an elementary with an imaginary component?
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Mar 10, 2012 #2
    Problem solved prof made a typo sorry
     
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