### Abstract

This work is to propose an iterative method of choice to compute a stable subspace of a regular matrix pencil. This approach is to define a sequence of matrix pencils via particular left null spaces. We show that this iteration preserves a semigroup property depending only on the initial matrix pencil. Via this recursion relationship, we propose an accelerated iterative method to compute the stable subspace and use it to provide a theoretical result to solve the principal square root of a given matrix, both nonsingular and singular. We show that this method can not only find out the matrix square root, but also construct an iterative approach which converges to the square root with any desired order.

Original language | English |
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Pages (from-to) | 1279-1298 |

Number of pages | 20 |

Journal | Linear and Multilinear Algebra |

Volume | 66 |

Issue number | 7 |

DOIs | |

Publication status | Published - 2018 Jul 3 |

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### All Science Journal Classification (ASJC) codes

- Algebra and Number Theory

### Cite this

*Linear and Multilinear Algebra*,

*66*(7), 1279-1298. https://doi.org/10.1080/03081087.2017.1348462

}

*Linear and Multilinear Algebra*, vol. 66, no. 7, pp. 1279-1298. https://doi.org/10.1080/03081087.2017.1348462

**An iterative method for solving the stable subspace of a matrix pencil and its application.** / Lin, Matthew M.; Chiang, Chun Yueh.

Research output: Contribution to journal › Article

TY - JOUR

T1 - An iterative method for solving the stable subspace of a matrix pencil and its application

AU - Lin, Matthew M.

AU - Chiang, Chun Yueh

PY - 2018/7/3

Y1 - 2018/7/3

N2 - This work is to propose an iterative method of choice to compute a stable subspace of a regular matrix pencil. This approach is to define a sequence of matrix pencils via particular left null spaces. We show that this iteration preserves a semigroup property depending only on the initial matrix pencil. Via this recursion relationship, we propose an accelerated iterative method to compute the stable subspace and use it to provide a theoretical result to solve the principal square root of a given matrix, both nonsingular and singular. We show that this method can not only find out the matrix square root, but also construct an iterative approach which converges to the square root with any desired order.

AB - This work is to propose an iterative method of choice to compute a stable subspace of a regular matrix pencil. This approach is to define a sequence of matrix pencils via particular left null spaces. We show that this iteration preserves a semigroup property depending only on the initial matrix pencil. Via this recursion relationship, we propose an accelerated iterative method to compute the stable subspace and use it to provide a theoretical result to solve the principal square root of a given matrix, both nonsingular and singular. We show that this method can not only find out the matrix square root, but also construct an iterative approach which converges to the square root with any desired order.

UR - http://www.scopus.com/inward/record.url?scp=85022039089&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85022039089&partnerID=8YFLogxK

U2 - 10.1080/03081087.2017.1348462

DO - 10.1080/03081087.2017.1348462

M3 - Article

AN - SCOPUS:85022039089

VL - 66

SP - 1279

EP - 1298

JO - Linear and Multilinear Algebra

JF - Linear and Multilinear Algebra

SN - 0308-1087

IS - 7

ER -