Abstract
We show that there is a unique graph with spectrum as in the title. It is a subgraph of the McLaughlin graph. The proof uses a strong form of the eigenvalue interlacing theorem to reduce the problem to one about root lattices.
Original language | English |
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Pages (from-to) | 71-75 |
Journal | Designs Codes and Cryptography |
Volume | 65 |
Issue number | 1-2 |
Publication status | Published - 2012 |