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What word can you use to describe a "set with repeated elements"

  1. Sep 11, 2014 #1
    The reason I have that in quotes is because by definition, elements in a set must be unique, and there is no concept of repeated elements. I was just wondering if there is a word to describe such an object - namely, a collection of "items" (or whatever you'd like to call them), where you might have repeated elements. Example : {2,2,5,1,4}. What word could I use to describe this?

    Thank you
  2. jcsd
  3. Sep 12, 2014 #2

    Stephen Tashi

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    Try "multiset"
  4. Sep 12, 2014 #3
    Thank you! Exactly what I was looking for!
  5. Sep 12, 2014 #4


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    Usually a set is distinguished by its elements alone, so , e.g., {2,2}={2}={2,2,2}, etc. If you want to distinguish different copies of an element, you can write something like {2,2'} or something similar.
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