1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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


    User Avatar
    Science Advisor
    Homework Helper

    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:
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook