Az Eszterházy Károly Tanárképző Főiskola Tudományos Közleményei. 2001. Sectio Mathematicae (Acta Academiae Paedagogicae Agriensis : Nova series ; Tom. 28)

Kocsis, I., On the stability of a sum form functional equation of multiplicative type

On the stability of a sum form functional equation of multiplicative type 53 References [1] ACZ

ÉL

, J., Lectures on Functional Equations and Thier Applications, Academic Press New York and London

, 1966. [2] EBANKS, B. R., KANNAPPAN, P. , SAHOO P. K. AND SANDER W., Characterizations of sum form information measures on open domain, Aequ. Math. 54 (1997), 1-30. [3] CJER R., The singular case in the stability behaviour of linear mappings, Grazer Math. Ber. 316 (1991), 59-70. [4] HYERS, D. H. AND RASSIAS, T. M., Approximate homomorfisms, Aequ. Math. 44 (1992), 125-153. [5] Kocsis, I., Stability of a sum form functional equation on open domain, Puhl. Math. Debrecen 57 (2000)(l-2), 135-143. [6] KOCSIS

, I. AND MAKSA, GY., The stability of a sum form functional equation arising in information theory, Acta Math. Hungar. 79 (1-2) (1998), 53-62. [7] LOSON CZL, L., Functional equation of sum form, Puhl. Math. Debrecen 32 (1985), 56-71. [8] LOSONCZI, L. AND MAKSA, GY., The general solution of a functional equation of information theory, —it Glasnik Mat. 16 (36) (1981), 261-266. [9] LOSONCZI, L. AND MAKSA, GY., On some functional equations of the information theory, Acta Math. Acad. Sei. Hungar. 39 (1982), 73-82. [10] MAKSA, GY., On the stability of a sum form equation, Results in Mathematics 26 (1994), 342-347. Imre Kocsis University of Debrecen Institute of Mathematics and Informatics 4010 Debrecen P.O. Box 12. Hungary e-mail: kocsisi@tech.klte.hu