%0 Journal Article %A Ryan R. Martin %A Abhishek Methuku %A Andrew Uzzell %A Shanise Walker %T A simple proof for a forbidden subposet problem %J The electronic journal of combinatorics %D 2020 %V 27 %N 1 %U http://geodesic.mathdoc.fr/articles/10.37236/7680/ %R 10.37236/7680 %F 10_37236_7680