About the group inverse and Moore-Penrose inverse of a product
About the group inverse and Moore-Penrose inverse of a product
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DOI:
10.1016/0024-3795(91)90180-5
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发表时间:
1991-05
影响因子:
1.1
通讯作者:
M. C. Gouveia;R. Puystjens
中科院分区:
文献类型:
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作者:
M. C. Gouveia;R. Puystjens
LetAbe a matrix over a ring. Suppose thatP,Q,P′, andQ′ are matrices over the ring such thatP′PA=A=AQQ′. IfAhas group inverseA#, thenPAQhas a group inverse iffAA#QPA+1−AA#is invertible. An analogous result for Moore-Penrose inverses is also given.