Math Help - Hasse diagram ?

1. Hasse diagram ?

Hi folks, I just wanted to "check my answers" -
here is a poset ({2,4,6,9,12,18,27,36,48,60,72},|)
that's "|" is divide (divisibility)

What's the answer for

1) upper bound of {2,9}
my answer) 18,36,72
2)least upper bound of {2,9}
my answer) 18

3)lower bounds of {60,72}
my answer) 6,2
4)greatest lower bound of {60,72}
my answer) 6

I wish Soroban knew some discrete math. He seems to be a nice guy!

2. i'll give it a try..
Originally Posted by robocop_911
Hi folks, I just wanted to "check my answers" -
here is a poset ({2,4,6,9,12,18,27,36,48,60,72},|)
that's "|" is divide (divisibility)

What's the answer for

1) upper bound of {2,9}
my answer) 18,36,72
2)least upper bound of {2,9}
my answer) 18
yes!

Originally Posted by robocop_911
3)lower bounds of {60,72}
my answer) 6,2
4)greatest lower bound of {60,72}
my answer) 6
how about including 12?

Originally Posted by robocop_911
I wish Soroban knew some discrete math. He seems to be a nice guy!
i believe Soroban knows it also..

3. Hello,

For question 3), there are 2, 6, 12 and 4