The Explicit Expression of the Drazin Inverse and Its Application

[摘要] We give explicit expressions of(P±Q)dof two matricesPandQ, in terms ofP,Q,Pd, andQd,(P±I)d, under the condition thatPQ=P, and apply the result to finding an explicit representation for the Drazin inverse of some2×2block matrix.

[学科分类] 应用数学