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G. Greaves

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Preprint Sep 2026

Neumaier graphs of coherent rank five

We construct an infinite family of Neumaier graphs of coherent rank five, answering the existence question at the smallest possible coherent rank beyond the strongly regular case. For every prime power $q\geqslant7$ with $q\equiv3\pmod4$, set $n=q+1$. Each graph in our construction has precisely five distinct eigenvalu...

G. Greaves, Zhao-Kuang Tan · 1 citation

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