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- TOEPLITZ MATRICES, A. R. MOGHADDAMFAR
- 2009

The purpose of this article is to study determinants of matrices which are known as generalized Pascal triangles (see [1]). We present a factorization by expressing such a matrix as a product of a unipotent lower triangular matrix, a Töeplitz matrix and a unipotent upper triangular matrix. The determinant of a generalized Pascal matrix equals thus the… (More)

- B. Akbari, A. R. Moghaddamfar
- IJAC
- 2012

- Ali Reza Moghaddamfar, Navid Salehy, S. Nima Salehy, A. R. MOGHADDAMFAR, S. NAVID SALEHY
- 2017

Let φ = (φi)i≥1 and ψ = (ψi)i≥1 be two arbitrary sequences with φ1 = ψ1. Let Aφ,ψ(n) denote the matrix of order n with entries ai,j , 1 ≤ i, j ≤ n, where a1,j = φj and ai,1 = ψi for 1 ≤ i ≤ n, and where ai,j = ai−1,j−1 + ai−1,j for 2 ≤ i, j ≤ n. It is of interest to evaluate the determinant of Aφ,ψ(n), where one of the sequences φ or ψ is the Fibonacci… (More)

In this paper, we first find the set of orders of all elements in some special linear groups over the binary field. Then, we will prove the characterizability of the special linear group PSL(13, 2) using only the set of its element orders.

The purpose of this article is to obtain some new infinite families of Toeplitz matrices, 7-matrices and generalized Pascal triangles whose leading principal minors form the Fibonacci, Lucas, Pell and Jacobsthal sequences. We also present a new proof for Theorem 3.1 in [R. Bacher. Determinants of matrices related to the Pascal triangle. J. Théor. Nombres… (More)

- Ali Reza Moghaddamfar, Kambiz Moghaddamfar, Hadiseh Tajbakhsh, ALI REZA MOGHADDAMFAR
- 2017

The purpose of this article is to obtain some new infinite families of Toeplitz matrices, 7-matrices and generalized Pascal triangles whose leading principal minors form the Fibonacci, Lucas, Pell and Jacobsthal sequences. We also present a new proof for Theorem 3.1 in [R. Bacher. Determinants of matrices related to the Pascal triangle. J. Théor. Nombres… (More)

The spectrum ω(G) of a finite group G is the set of element orders of G. If Ω is a non-empty subset of the set of natural numbers, h(Ω) stands for the number of isomorphism classes of finite groups G with ω(G) = Ω and put h(G) = h(ω(G)). We say that G is recognizable (by spectrum ω(G)) if h(G) = 1. The group G is almost recognizable (resp. nonrecognizable)… (More)

Let φ = (φi)i≥1 and ψ = (ψi)i≥1 be two arbitrary sequences with φ1 = ψ1. Let Aφ,ψ(n) denote the matrix of order n with entries ai,j , 1 ≤ i, j ≤ n, where a1,j = φj and ai,1 = ψi for 1 ≤ i ≤ n, and where ai,j = ai−1,j−1 + ai−1,j for 2 ≤ i, j ≤ n. It is of interest to evaluate the determinant of Aφ,ψ(n), where one of the sequences φ or ψ is the Fibonacci… (More)

- A. R. Moghaddamfar, S. Rahbariyan, S. Navid Salehy, S. Nima Salehy
- Ars Comb.
- 2017

- A. R. Moghaddamfar
- IJAC
- 2006