1-Restricted Optimal Rubbling on Graphs
Let G be a graph with vertex set V and a distribution of pebbles on the vertices of V . A pebbling move consists of removing two pebbles from a vertex and placing one pebble on a neighboring vertex, and a rubbling move consists of removing a pebble from each of two neighbors of a vertex v and placing a pebble on v. We seek an initial placement of a minimum total number of pebbles on the vertices in V, so that no vertex receives more than one pebble and for any given vertex v ∈ V, it is possible, by a sequence of pebbling and rubbling moves, to move at least one pebble to v. This minimum number of pebbles is the 1-restricted optimal rubbling number. We determine the 1-restricted optimal rubbling numbers for Cartesian products. We also present bounds on the 1-restricted optimal rubbling number.
Beeler, Robert A.; Haynes, Teresa W.; and Murphy, Kyle. 2019. 1-Restricted Optimal Rubbling on Graphs. Discussiones Mathematicae - Graph Theory. Vol.39(1). 575-588. https://doi.org/10.7151/dmgt.2102 ISSN: 1234-3099