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Author = Karbassi,%20Seyed%20Mehdi

Number of Articles: 2
Some new restart vectors for explicitly restarted Arnoldi method

Zeinab Abadi; Seyed Abolfazl Shahzadeh Fazeli; Seyed Mehdi Karbassi

Volume 51, Issue 1 , June 2019, , Pages 91-105

https://doi.org/10.22059/jac.2019.71545

Abstract
  The explicitly restarted Arnoldi method (ERAM) can be used to find some eigenvalues of large and sparse matrices. However, it has been shown that even this method may fail to converge. In this paper, we present two new methods to accelerate the convergence of ERAM algorithm. In these methods, we apply ...  Read More
Inverse eigenvalue problem for matrices whose graph is a banana tree

Maryam Babaei Zarch; Seyed Abolfazl Shahzadeh Fazeli; Seyed Mehdi Karbassi

Volume 50, issue 2 , December 2018, , Pages 89-101

https://doi.org/10.22059/jac.2018.69994

Abstract
  In this  paper, we consider an  inverse eigenvalue problem (IEP) for constructing  a special  kind of acyclic matrices. The problem involves the reconstruction of matrices whose graph is a  banana tree. This is performed by using the  minimal and maximal eigenvalues of all  ...  Read More