Abstract
Motivated by a question in cellular telecommunication technology, we investigate a family of graph coloring problems where several colors can be assigned to each vertex and no two colors are the same within any ball of radiusR. We find bounds and coloring algorithms for different kinds of graphs including trees,n-cycles, hypercubes and lattices. We briefly examine connections to Heawood's map color theorem and state a few conjectures and open problems.
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