Chains | Anti- Chains | Maximal Elements | Minimal Elements | Discrete Mathematics 

{phi, {a,b}} shouldn't be an anti chain as phi is a subset of {a,b}

Very well explained, thank you!

2:10 phi and a,b are not anti chain. in fact phi can never be a part of an anti chain of the relation "subset of" because phi will always be a subset of any set.

Thanks for the video