A generalization of a result of Häggkvist and Nicoghossian
Using a variation of the Bondy-Chvátal closure theorem the following result is proved: If G is a 2-connected graph with n vertices and connectivity \(\kappa\) such that \(d(x)+d(y)+d(z)\geq n+\kappa\) for any triple of independent vertices x, y, z, then G is Hamiltonian.
scientific article; zbMATH DE number 4031744