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Density regions, integer certificates and packing colorings of distance graphs

Zhang, Enkai
arXiv (All) · Papers
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05c15combinatorics
We study simultaneous color densities in packing colorings of integer distance graphs. For $D(1,6)$, we determine several exact density regions and prove that colors $1$ through $7$ have maximum combined density $211/252$. When this maximum is approached, the seven individual color frequencies are f
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