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HELP on partial order!

  1. Sep 19, 2009 #1
    I'm stumbling on this basic question!

    Let X = {2,3,4,5,8,9,15,27,45}.
    Define a partial order | on X such that x|y <--> x divides y.

    (a) Find the maximal and minimal elements
    (b) Is there a greatest element, if so what is it?
    (c) Is there a least element, if so what is it?
    (d) Draw the Hasse diagram

    Please help!
     
  2. jcsd
  3. Sep 20, 2009 #2

    tiny-tim

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    Welcome to PF!

    Hi Peter! Welcome to PF! :wink:

    Show us what you've tried, and where you're stuck, and then we'll know how to help! :smile:
     
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