2 papers
math.CO2023
A collection of open problems in celebration of Imre Leader's 60th birthday
Rahil Baber, Natalie Behague, Asier Calbet +10
One of the great pleasures of working with Imre Leader is to experience his infectious delight on encountering a compelling combinatorial problem. This collection of open problems…
math.CO2023
Asymmetry of 2-step Transit Probabilities in 2-Coloured Regular Graphs
Ron Gray, J. Robert Johnson
Suppose that the vertices of a regular graph are coloured red and blue with an equal number of each (we call this a balanced colouring). Since the graph is undirected, the number o…