combinatorics / Extremal graph theory

Koch-Narayan Conjecture 1

For a bipartite graph without isolated vertices and with a unique minimum dominating set, does the proposed function $m(n, \gamma)$ bound the number of edges whenever $\gamma \ge 2$ and $n \ge 3\gamma$? A $13$-vertex bipartite graph with $22$ edges exceeds the conjectured maximum of $21$.

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combinatoricsJun 12, 2026Significance 5/100Registry: unreviewed

Koch-Narayan Conjecture 1

Prior state unknowndisproved

For a bipartite graph without isolated vertices and with a unique minimum dominating set, does the proposed function $m(n, \gamma)$ bound the number of edges whenever $\gamma \ge 2$ and $n \ge 3\gamma$? A $13$-vertex bipartite graph with $22$ edges exceeds the conjectured maximum of $21$.

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For a bipartite graph without isolated vertices and with a unique minimum dominating set, does the proposed function $m(n, \gamma)$ bound the number of edges whenever $\gamma \ge 2$ and $n \ge 3\gamma$? A $13$-vertex bipartite graph with $22$ edges exceeds the conjectured maximum of $21$.

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