Unformatted text preview: { 2 , 4 , 6 , 9 , 12 , 18 , 27 , 36 , 48 , 60 , 72 } ,  ) a) Find the maximal elements. b) Find the minimal elements. c) Find all upper bounds of { 2 , 9 } d) Find the least upper bound of { 2 , 9 } if it exists. Bonus (1 pt): What is Ben Ellison’s o±ce number? 1...
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 Fall '08
 Miller
 Math, Integers, Order theory, Equivalence relation, Partially ordered set, positive integers, Upper Bounds, Ben Ellison

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