| Planar Graphs whose Second Largest Eigenvalue Smaller than $\frac{\sqrt{5}-1}{2}$ |
| Received:April 17, 2023 Revised:July 08, 2023 |
| Key Words:
planar graph the second largest eigenvalue complete product
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| Fund Project:Supported by the National Natural Science Foundation of China (Grant No.12171154). |
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| Abstract: |
| A graph $G$ is said to be planar if $G$ can be drawn on the plane in such a way that its edges intersect only at their endpoints. In this paper, all the planar graphs without isolated vertices whose second largest eigenvalue smaller than $\frac{\sqrt{5}-1}{2}$ are characterized. |
| Citation: |
| DOI:10.3770/j.issn:2095-2651.2024.01.001 |
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