0
$\begingroup$

enter image description here

I have definition:

enter image description here

I think the answer is $\{3;4\}$. It's a correct?

  • 0
    @coffeemath: Of course it is a poset. _Every_ set of sets ordered by $\subseteq$ makes a poset. – 2017-01-18
  • 0
    @HenningMakholm You're right! Deleting comment. – 2017-01-18

1 Answers 1

4

Yes, your answer is indeed correct.