1 |
R. Badora & R. Ger: On some trigonometric functional inequalities. Functional Equations- Results and Advances, 3-15 (2002).
|
2 |
P. de P. Friis: d'Alembert's and Wilson's equations on Lie groups. Aequationes Math. 67 (2004), 12-25.
DOI
|
3 |
M. Eshaghi Gordji & M. Parviz: On the Hyers-Ulam-Rassias stability of the functional equation . Nonlinear Funct. Anal. Appl. 14 (2009), 413-420.
|
4 |
D.H. Hyers: On the stability of the linear functional equation. Proc. Nat. Acad. Sci. U. S. A., 27 (1941), 222-224.
DOI
|
5 |
Pl. Kannappan & G.H. Kim: On the stability of the generalized cosine functional equations. Annales Acadedmiae Paedagogicae Cracoviensis - Studia Mathematica 1 (2001), 49-58.
|
6 |
G.H. Kim: On the stability of the generalized sine functional equations. Acta Math. Sin., Engl. Ser. 25 (2009), 965-972
|
7 |
G.H. Kim: On the superstability of the pexider type trigonometric functional equation. Journal of Inequalities Applications 2010 (2010), Doi:10.1155/2010/897123.
DOI
|
8 |
G.H. Kim: The stability of the d'Alembert and Jensen type functional equations. J. Math. Anal & Appl. 325 (2007), 237-248.
DOI
|
9 |
G.H. Kim: The stability of pexiderized cosine functional equations. Korean J. Math. 16 (2008), no. 1, 103-114.
DOI
|
10 |
G.H. Kim: On the stability of mixed trigonometric functional equations. Banach J. Math. Anal. 2 (2007), 227-236.
DOI
|
11 |
P. Sinopoulos: Generalized sine equations. III. Aequationes Math. 51 (1996), 311-327.
DOI
|
12 |
G.H. Kim: Superstability of the p-radical functional equations related to Wilson's and Kim's equation. Int. J. Nonlinear. Anal. Appl. 12 (2021), 571-582.
|
13 |
R. Badora: On the stability of cosine functional equation. Rocznik Naukowo-Dydak., Prace Mat. 15 (1998), 1-14.
|
14 |
G.H. Kim & Sever S. Dragomir: On the the Stability of generalized d'Alembert and Jensen functional equation. Intern. Jour. Math. & Math. Sci. preprint (2006).
|
15 |
E. Elqorachi & M. Akkouchi: On Hyers-Ulam stability of the generalized Cauchy and Wilson equations. Publ. Math. Debrecen 66 (2005), 283-301.
DOI
|
16 |
B. Bouikhalene, E. Elquorachi & J.M. Rassias: The superstability of d'Alembert's functional equation on the Heisenberg group. Appl. Math. Lett. 23 (2010), 105-109.
DOI
|
17 |
G.H. Kim: A stability of the generalized sine functional equations. J. Math. Anal & Appl. preprint (2007).
|
18 |
G.H. Kim & S.H. Lee: Stability of the d'Alembert type functional equations. Nonlinear Funct. Anal. Appl. 9 (2004), 593-604.
|
19 |
S.M. Ulam: 'Problems in Modern Mathematics' Chap. VI, Science editions. Wiley, New York, (1964)
|
20 |
M. Almahalebi, R. El Ghali, S. Kabbaj & C. Park: Superstability of p-radical functional equations related to WilsonKannappanKim functional equations. Results Math. 76 (2021), Paper No. 97.
|
21 |
J.A. Baker: The stability of the cosine equation. Proc. Amer. Math. Soc. 80 (1980), 411-416.
DOI
|
22 |
G.H. Kim: A stability of the generalized sine functional equations. Jour. Math. Anal & Appl. 331 (2007), 886-894.
DOI
|
23 |
J. Baker, J. Lawrence & F. Zorzitto: The stability of the equation f(x+y) = f(x)f(y). Proc. Amer. Math. Soc. 74 (1979), 242-246.
DOI
|
24 |
P.W. Cholewa: The stability of the sine equation. Proc. Amer. Math. Soc. 88 (1983), 631-634.
DOI
|