An extension of Cline''s formula for a generalized Drazin inverse
Haifeng Lian, Qingping Zeng · TURKISH JOURNAL OF MATHEMATICS · 2015
In this note we give an answer to a question recently posed by Zeng and Zhong, to note that Cline's formula for a generalized Drazin inverse extends to the case when $aba=aca$. Cline's formula for a pseudo Drazin inverse is also presented in this case.