Turán extremal graphs vs. Signless Laplacian spectral Turán extremal graphs

Ming-Zhu Chen, Ya-Lei Jin, Peng-Li Zhang +1

Let $F$ be a graph with chromatic number $\ddot{I}‡(F)=r+1$. Denote by $ex(n,F)$ and $Ex(n,F)$ the Turán number and the set of all extremal graphs for $F$, respectively. In addition,…