Which cubic graphs have an eigenvalue of $\sqrt{6}$?
Can these graphs be constructed?
The question is related to this one...
2025-01-13 05:49:01.1736747341
Which cubic graphs have an eigenvalue of $\sqrt{6}$?
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After a quick look at GraphData[] in Mathematica, here are some simple graphs with eigenvalues of $\sqrt{6}$. That value is also in their spectrum.
Ah, you're asking for cubic graphs. Same process: