The Turán number of the Cartesian product of a star and an edge

Xiamiao Zhao, Xin Cheng, Cheng Chi +3

Let $C_k$ denote the cycle of length $k$, $S_t$ be a star with $t$ edges. And let $B_t$ be the graph consisting of $t$ copies of $C_4$ sharing one fixed edge. Equivalently, $B_t=K_…