An elementary proof of the bunkbed conjecture for forests
Serte Donderwinkel, Joost Jorritsma, Guillem Perarnau·2025-11-18·via math.CO updates on arXiv.org
Although false for general graphs, this note gives an elementary proof of the bunkbed conjecture for any acyclic graph. The argument is short and self-contained, and may be of educational interest.