2 papers
math.CO2026
Cubic graphs, -minors and conformal minors
Nishad Kothari, Orlando Lee, Cláudio L. Lucchesi +1
It is well-known that any class of simple graphs, that is characterized by finitely many forbidden minors, also admits a characterization by finitely many forbidden topological min…
math.CO2026
Orthogonality between acyclic subdigraphs and paths in digraphs
Caroline A. de Paula Silva, Cândida Nunes da Silva, Orlando Lee
Let be a digraph. A collection of disjoint sets of vertices (respec., collection of disjoint subdigraphs) of and a vertex subset (or subdigraph) of ar…