Do 3n-5 Edges Force a Subdivision of K5?
Abstract
A conjecture of Dirac states that every simple graph with n vertices and 3n - 5 edges must contain a subdivision of K5. We prove that a topologically minimal counterexample is 5-connected, and that no minor-minimal counterexample contains K sub 4 - e. Consequently, we prove Dirac's conjecture for all graphs that can be imbedded in a surface with Euler characteristic at least -2.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1990
- Accession Number
- ADA221469
Entities
People
- Andre E. Kezdy
- Patrick J. Mcguinness
Organizations
- University of Illinois Urbana–Champaign