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Circulant digraphs determined by their spectra |
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| Authors: | Qiongxiang Huang and An Chang |
| Institution: | a Department of Mathematics, Xinjiang University, Urumuqi, Xinjiang 830046, People's Republic of China b Department of Mathematics, Fuzhou University, Fuzhou, Fu Jian, People's Republic of China |
| Abstract: | Inspired by Ádám's conjecture the isomorphism problem of circulant digraphs is widely investigated. In the literature, the spectrum method was to solve the isomorphism problem for the circulants of prime-power order by some people. In this paper, we develop the spectrum method to characterize the circulant digraphs of orders pa and paqb, where p and q are distinct primes. |
| Keywords: | Circulant digraph Isomorphism Spectrum Cyclotomic polynomial |
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