Reverse Order Law for the Drazin Inverse in Banach Spaces

  • Hua WangEmail author
  • Junjie Huang
Original Paper


We derive some equivalent conditions for the reverse order law \((PQ)^D=Q^DP^D\) to hold for Drazin invertible bounded linear operators P and Q. Moreover, the Drazin invertibility of sum is investigated for two bounded linear operators and the expression of Drazin inverse is presented. The results generalize some recent works.


Drazin inverse Reverse order law Bounded linear operator 

Mathematics Subject Classification

15A09 46C05 



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Copyright information

© Iranian Mathematical Society 2019

Authors and Affiliations

  1. 1.College of SciencesInner Mongolia University of TechnologyHohhotPeople’s Republic of China
  2. 2.School of Mathematical SciencesInner Mongolia UniversityHohhotPeople’s Republic of China

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