Kannappan, PL.; Laird, Philip G. Functional equations and second degree polynomials. (English) Zbl 0808.39011 J. Ramanujan Math. Soc. 8, No. 1-2, 95-110 (1993). Some functional equations in a single variable, where the solutions are quadratic polynomials, are considered. Some new results are presented, some yield extended or generalized versions of known results. Moreover, a characterization of the polynomials of degree two is given.A similar paper concerning several variables was written by P. G. Laird and R. McCann [Am. Math. Monthly 91, 114-116 (1984; Zbl 0598.26028)]. Reviewer: J.Kalinowski (Katowice) MSC: 39B32 Functional equations for complex functions 39B22 Functional equations for real functions 12E10 Special polynomials in general fields Keywords:functional equations; quadratic polynomials; polynomials of degree two Citations:Zbl 0598.26028 PDFBibTeX XMLCite \textit{PL. Kannappan} and \textit{P. G. Laird}, J. Ramanujan Math. Soc. 8, No. 1--2, 95--110 (1993; Zbl 0808.39011)