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- Mehdi Eliasi, Bijan Taeri
- Discrete Applied Mathematics
- 2009

- Bijan Taeri, Bijan Taeri
- 2009

A subset of n tuples of elements of Z9 is said to be a code over Z9 if it is a Z9-module. In this paper we consider an special family of cyclic codes over Z9, namely quadratic residue codes. We define these codes in term of their idempotent generators and show that these codes also have many good properties which are analogous in many respects to properties… (More)

- Ali Behtoei, Mohsen Jannesari, Bijan Taeri
- Appl. Math. Lett.
- 2009

- Abbas Heydari, Bijan Taeri
- Ars Comb.
- 2013

- Abbas Heydari, Bijan Taeri
- Eur. J. Comb.
- 2009

- Mehdi Eliasi, Ghaffar Raeisi, Bijan Taeri
- Discrete Applied Mathematics
- 2012

- Majid Arezoomand, Bijan Taeri
- Electr. J. Comb.
- 2013

A digraph Γ is called n-Cayley digraph over a group G, if there exists a semiregular subgroup RG of Aut(Γ) isomorphic to G with n orbits. In this paper, we represent the adjacency matrix of Γ as a diagonal block matrix in terms of irreducible representations of G and determine its characteristic polynomial. As corollaries of this result we find: the… (More)

- Ali Behtoei, Mohsen Jannesari, Bijan Taeri
- Discrete Applied Mathematics
- 2010

- Mehdi Eliasi, Bijan Taeri
- 2008

Abstract: The Hosoya polynomial of a molecular graph G is defined as ∑ ⊆ = ) ( } , { ) , ( ) , ( G V v u v u d G H λ λ , where d(u,v) is the distance between vertices u and v. The first derivative of H(G,λ) at λ = 1 is equal to the Wiener index of G, defined as ∑ ⊆ = ) ( } , { ) , ( ) ( G V v u v u d G W . The second derivative of ) , ( 2 1 λ λ G H at λ = 1… (More)

- Mehdi Eliasi, Bijan Taeri
- Appl. Math. Lett.
- 2008

The Wiener index W (G) of a connected graph G is defined as the sum of distances between all pairs of vertices. The Wiener polynomial H(G, x) has the property that its first derivative evaluated at x = 1 equals the Wiener index, i.e. H (G, 1) = W (G). The hyper-Wiener polynomial H H(G, x) satisfies the condition H H (G, 1) = W W (G), the hyper-Wiener index… (More)