PUBLICATIONS DE L'INSTITUT MATHÉMATIQUE (BEOGRAD) (N.S.) Vol. 43(57), pp. 8591 (1988) 

On a system of functional equationsJovan D. Ke\v cki\'cFarmaceutski fakultet, Beograd, YugoslaviaAbstract: We consider the system of functional equations (3), written in the matrix form (4). The general solution of this system is obtained provided that there exist $\lambda,\mu\in C$ such that $\lambda A+\mu B$ is nonsingular. The solutions are expressed by means of generalized inverses of matrices. Classification (MSC2000): 39B30; 15A09 Full text of the article:
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