Spectral Turán problem of non-bipartite graphs: Forbidden books

Ruifang Liu, Lu Miao

A book graph $B_{r+1}$ is a set of $r+1$ triangles with a common edge, where $r\ge 0$ is an integer. Zhai and Lin [J. Graph Theory 102 (2023) 502-520] proved that for $n\geq\frac{1…