We present some representations for the generalized Drazin inverse of a block matrix x =[cd ab]in a Banach algebra ~4 in terms of ad and (be)d under certain conditions,extending some recent result related to the gen...We present some representations for the generalized Drazin inverse of a block matrix x =[cd ab]in a Banach algebra ~4 in terms of ad and (be)d under certain conditions,extending some recent result related to the generalized Drazin inverse of an anti-triangular operator matrix. Also, several particular cases of this result are considered.展开更多
In this paper, we investigate additive results of the Drazin inverse of elements in a ring R. Under the condition ab = ha, we show that a + b is Drazin invertible if and only if aaD (a + b) is Drazin invertible, w...In this paper, we investigate additive results of the Drazin inverse of elements in a ring R. Under the condition ab = ha, we show that a + b is Drazin invertible if and only if aaD (a + b) is Drazin invertible, where the superscript D means the Drazin inverse. Furthermore we find an expression of (a + b)D. As an application we give some new representations for the Drazin inverse of a 2 × 2 block matrix.展开更多
基金supported by the Ministry of Education and Science,Republic of Serbia(174007)
文摘We present some representations for the generalized Drazin inverse of a block matrix x =[cd ab]in a Banach algebra ~4 in terms of ad and (be)d under certain conditions,extending some recent result related to the generalized Drazin inverse of an anti-triangular operator matrix. Also, several particular cases of this result are considered.
基金Supported by the National Natural Science Foundation of China(11361009)the Guangxi Provincial Natural Science Foundation of China(2013GXNSFAA019008)Science Research Project 2013 of the China-ASEAN Study Center(Guangxi Science Experiment Center)of Guangxi University for Nationalities
文摘In this paper, we investigate additive results of the Drazin inverse of elements in a ring R. Under the condition ab = ha, we show that a + b is Drazin invertible if and only if aaD (a + b) is Drazin invertible, where the superscript D means the Drazin inverse. Furthermore we find an expression of (a + b)D. As an application we give some new representations for the Drazin inverse of a 2 × 2 block matrix.
基金supported by the National Natural Science Foundation of China under grant 10971024the Speeialized Research Fund for the Doetoral Program of Higher Edueation under grant 200802860024the Natural Science Foundation of Jiangsu Province under grant BK2010393