An $r$-uniform hypergraph is linear if every two edges intersect in at most one vertex. Given a family of hypergraphs $\mathcal{F}$, the Turán number ex$_r^{lin}(n,\mathcal{F})$ maximum on $n$ vertices that does not contain any member $\mathcal{F}$ as subgraph.
 Let $K_l$ be complete graph with $l$ and $r\geq 2$. The $r$-expansion $r$-graph $K_l^+$ obtained from by enlarging each edge $r-2...