PUBLICATIONS DE L'INSTITUT MATHÉMATIQUE (BEOGRAD) (N.S.) Vol. 38(52), pp. 3944 (1985) 

COMMUTATIVE WEAK GENERALIZED INVERSES OF A SQUARE MATRIX AND SOME RELATED MATRIX EQUATIONSJovan D. Kecki\'cFarmaceutski fakultet, Beograd, YugoslaviaAbstract: The chief concern of this paper is the existence and the construction of all weak generalized inverses which commute with the original matrix; in other words we are concerned with the system $AXA=A$, AX=XA$. Some other matrix systems and equations are also considered. Classification (MSC2000): 15A09, 15A24 Full text of the article:
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