Nath, Prem Some functional equations arising from the concept of unexpectedness of an event in information theory. (English) Zbl 1227.39019 J. Inform. Math. Sci. 3, No. 1, 41-54 (2011). This paper contains the solution of five functional equations, the solutions of some of the functional equations are known. Reviewer: Pl. Kannappan (Waterloo) MSC: 39B22 Functional equations for real functions 39B52 Functional equations for functions with more general domains and/or ranges 94A15 Information theory (general) Keywords:probability space; unexpectedness of an event; Pompeiu functional equation; logarithmic function; multiplicative function; information theory PDFBibTeX XMLCite \textit{P. Nath}, J. Inform. Math. Sci. 3, No. 1, 41--54 (2011; Zbl 1227.39019)