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Homework Help: Quick, simple question on sets

  1. Mar 21, 2008 #1
    [SOLVED] Quick, simple question on sets

    1. The problem statement, all variables and given/known data
    A - B is the difference
    A u B is the union
    A n B is the intersection
    A (+) B is what?

    I would google this, but I haven't a clue what the symbol or function is called. It's supposed to be a +, inside a circle.

    Can someone tell me what this symbol means, or at least tell me what it's called, so I can look it up myself?

    Edit: In TeX, it's this: [tex]\oplus[/tex]
    Last edited: Mar 21, 2008
  2. jcsd
  3. Mar 21, 2008 #2
    Found it.

    For anyone else with a similar problem, it's the "symmetric difference"

    A (+) B = AuB - AnB
    (The set of elements in either A or B, but not in both)
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