3 papers
math.CO2026
Hamiltonian cycles and Hamiltonian paths in -connected, -tough and -free graphs
Hui Liu, Yingzhi Tian
A graph is called Hamiltonian if it possesses a Hamiltonian cycle; and is called Hamiltonian-connected if it contains a Hamiltonian path between any two distinct vertices.…
math.CO2026
Large induced forests in planar multigraphs
Mikhail Makarov
For a graph , denote by the number of vertices in the largest induced forest in . The Albertson-Berman conjecture, which has been open since 1979, states that $a(G) \g…
math.CO2026
Branching -path vertex cover of forests
Mikhail Makarov
We define a set to be a branching -path vertex cover of an undirected forest if all leaves and isolated vertices (vertices of degree at most ) of belong to an…