2 problems

Let $H$ be a graph. Call $H$ unavoidable if the cover graph of every poset of sufficiently large dimension contains $H$ as a minor. Kelly's construction refers to the family of pla…

Let $P$ be a poset, let $G$ be the cover graph of $P$, and let $Q$ be the incidence poset of $G$. Cover-graph incidence-poset doubling conjecture. For every $t\ge1$, there exists a…