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arXiv 2010-04-19 0 views

Lower bounds for identifying codes in some infinite grids

Martin, Ryan · Stanton, Brendon

Original · EN

An r-identifying code on a graph G is a set C⊂ V(G) such that for every vertex in V(G), the intersection of the radius-r closed neighborhood with C is nonempty and unique. On a finite graph, the density of a code is |C|/|V(G)|, which naturally extends to a definition of density in certain infinite graphs which are locally finite. We present new lower bounds for densities of codes for some small values of r in both the square and hexagonal grids.

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