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Unknown symbol in a fuzzy logic equation

  1. Jul 17, 2004 #1
    Hi people

    I study on image processing and fuzzy logic. When I working on histogram normalization, I saw an equation which includes a symbol 'U' letter. On the bottom of the 'U' (m=1) and on the top of the 'U' (K) is written. And i want to learn what its (U) mean.

    Thanks in advance.

    Cuneyd HELVACI
     
  2. jcsd
  3. Jul 17, 2004 #2

    Hurkyl

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    It's the union of a bunch of objects; it's exactly analogous to using [itex]\sum_{i=1}^k a_i[/itex] to denote a bunch of additions.
     
  4. Jul 17, 2004 #3
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