一类反三角块阵的群逆

2020-11-11 05:26生玉秋
高师理科学刊 2020年10期
关键词:环上国家自然科学基金二阶

生玉秋

一类反三角块阵的群逆

生玉秋

(琼台师范学院 数理系,海南 海口 571127)

研究环上一类二阶反三角块阵的群逆问题.利用矩阵群逆的性质和环上矩阵运算技巧,得到了一类二阶反三角块阵群逆存在的充要条件,给出了具体的群逆表达式,并给出了应用实例.

群逆;反三角块阵;环

1 引言及预备知识

引理2来源于文献[10]的引理2.4,其中(3)~(4)原文献中没有,但由(1)~(2)易推出.

类似可证,条件(2)等价于条件(3). 证毕.

2 主要结果及证明

依次利用式(8)(1),可得

由定理、引理2~3可得到推论1.

3 实例

给出3个应用前面结果计算群逆的实例,涉及的矩阵都是模6的剩余类环上的.

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[2] Meyer C D,Rose N J.The index and the Drazin inverse of block triangular matrices[J].SIAM J Appl Math,1977,33:1-7

[3] Hartwig R E,Shoaf J.Group inverses and Drazin inverse of bidiagonal and triangular Teoplitz matrices[J].J Aust Math Soc Ser, 1977(24):10-34

[4] Zhao J M,Bu C J.Group inverses for the block matrices with two identical subblocks over skew fields[J].Electron J Linear Algebra,2010,21:63-75

[5] Bu C J,Li M,Zhang K Z,et al.Group inverses for the block matrices with an invertible subblock[J].Appl Math Comput, 2009,215:132-139

[6] Liu X F,Yang H.Further results on the group inverses and Drazin inverses of anti-triangular block matrices[J].Appl Math Comput2012,218:8978-8986

[7] Ge Y,Zhang H,Sheng Y Q,et al.Group inverse for two classes of 2×2 anti-triangular block matrices over right Ore domains[J].J Appl Math Comput,2013(42):183-191

[8] Cao C G,Zhang H Y,Ge Y L.Further results on the group inverse of some anti-triangular block matrices[J].JAppl Math Comput,2014(46):169-179

[9] Cao C G,Wang Y C,Sheng Y Q.Group inverses for some 2×2 block matrices over rings[J].Front Math China,2016,11:521-538

[10] Zhang H.A note on the group inverses of block matrices over rings[J].Filomat,2017,31(12):3685-3692

Group inverses of a class of anti-triangular block matrix

SHENG Yuqiu

(Department of Mathematics and Physics,Qiongtai Normal University,Haikou 571127,China)

The group inverses of a class of second order anti-triangular block matrix over a ring are studied.Using the properties of group inverses of matrix and the operation skills of matrix over a ring,the necessary and sufficient conditions for the existence of group inverses of a class of second order anti-triangular block matrices was obtained.The concrete expressions of group inverses and the application examples was given.

group inverses;anti-triangular block matrix;ring

O151.21

A

10.3969/j.issn.1007-9831.2020.10.001

1007-9831(2020)10-0001-04

2020-07-15

国家自然科学基金项目(11771069,11526084)

生玉秋(1973-),女,黑龙江双城人,教授,博士,从事矩阵代数研究.E-mail:shengyuqiu1973@163.com

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