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- Yongxin Yuan, Kezheng Zuo
- Applied Mathematics and Computation
- 2015

- Kezheng Zuo, Tao Xie
- Wuhan University Journal of Natural Sciences
- 2012

The invertibility of combinations of two orthogonal projectors a P + b Q + c PQ + d QP is researched by using the CS-decomposition of matrices and properties of orthogonal projectors. The Moore-Penrose inverse of the combinations is presented under some special conditions.

- Kezheng Zuo
- Wuhan University Journal of Natural Sciences
- 2010

The paper researches the rank of combinations a PA + b AQ-c PAQ of two idempotent matrices P and Q. Using the properties of the idempotent matrix and elementary block matrix operation, we get some rank equalities for combinations a PA + b AQ-c PAQ of two idempotent matrices P and Q. These rank equalities generalize the results of Koliha J J, Rakočević V and… (More)

- Yinlan Chen, Kezheng Zuo, Tao Xie
- Wuhan University Journal of Natural Sciences
- 2014

In this paper, some conditions for the nonsingularity and group inverses of linear combinations of generalized and hypergeneralized projectors are established. Moreover, some formulae for the inverses and group inverses of them are derived. The work of this paper extends some previous results.

- Yongxin Yuan, Kezheng Zuo
- Applied Mathematics and Computation
- 2014

- Yongxin Yuan, Kezheng Zuo
- Applied Mathematics and Computation
- 2015

- Yongxin Yuan, Kezheng Zuo
- 2015

In this paper, a system of linear matrix equations is considered. A new necessary and sufficient condition for the consistency of the equations is derived by means of the generalized singular-value decomposition, and the explicit representation of the general solution is provided. Keywords—Matrix equation, Generalized inverse, Generalized singular-value… (More)

- Gaojun Luo, Kezheng Zuo, Liang Zhou
- Wuhan University Journal of Natural Sciences
- 2015

In this paper, we revisit the core inverse introduced by Baksalary and Trenkler. We first give some new characterizations of the core inverse. Then, we give a new representation of the core inverse, which is related to A T,S (2) .

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