In this paper, we investigate the general solution of a new quadratic functional equation of
the form∑ 1≤ i< j< k≤ r ϕ li+ lj+ lk= r− 2∑ i= 1, i≠ jr ϕ li+ lj+− r 2+ 32 r−/2∑ i= 1 r ϕ li. We …

In this paper, we investigate the general solution of a new quadratic functional equation. We
prove that a function admits, in appropriate conditions, a unique quadratic map** …

On the general solution of a quadratic functional equation and its Ulam stability in various
abstract spaces Page 1 On the general solution of a quadratic functional equation and its Ulam …

On the Ulam stability of an n-dimensional quadratic functional equation Page 1 Available
online at www.tjnsa.com J. Nonlinear Sci. Appl. 9 (2016), 332–341 Research Article On the …

This chapter presents a comprehensive study of the classical topic of functional equations. It
introduces a new Euler‐Lagrange‐Jensen (a, b; k= a+ b)‐sextic functional equation. The …

The aim of this work is to put together some of the recent and classical results in the theory of
stability. In the first part, we recall the results regarding the intermediary points arising from …