Cai-Li Jia

Size Conditions for Pancyclicity of $t$-Tough Graphs

The toughness of a connected noncomplete graph $G$ is$$\tau(G)=\min\left\{\frac{|S|}{c(G-S)}:S\subseteq V(G),\ c(G-S)\geq2\right\},$$where $c(G)$ is the number of components of $G$; as usual, $\tau(K_n)=\infty$. In 1973, Bondy proposed the metaconjecture that almost every nontrivial condition implying Hamiltonicity sho...