New iterative methods for finding matrix sign function: derivation and application

  • Mohammad Momenzadeh
  • Taher LotfiEmail author


The objective of this research was to provide two new methods for the sign function of a matrix. It is discussed that the schemes are novel and present global convergence behaviors. Then, the high convergence speeds of these iterative methods are proved and confirmed for calculating the matrix sign of different types of nonsingular matrices to reveal their applicability over the existing iterative methods of the same type.


Sign function Matrix iterations Eigenvalues High order Attraction basin 

Mathematics Subject Classification

65F30 41A25 65F60 



The authors are thankful to two anonymous referees for several corrections and comments, which directly contribute to the readability of this paper.


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Copyright information

© SBMAC - Sociedade Brasileira de Matemática Aplicada e Computacional 2019

Authors and Affiliations

  1. 1.Department of Mathematics, Hamedan BranchIslamic Azad UniversityHamedanIran

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