Add to ORKGAbstract. We investigate the stability of the functional equation f(x+ y + z + w) + 2f(x) + 2f(y) + 2f(z) + 2f(w) − f(x+ y) − f(x+ z) − f(x+ w) − f(y + z) − f(y + w) − f(z + w) = 0 by using a fixed point theorem in the sense of L. Cădariu and V. Radu. 1
AbstractIn this paper, we obtain the general solution and the stability of the 2-variable quadratic ...
Lee, An and Park introduced the quadratic functional equation f(2x+y) + f(2x-y) = 8f(x) + 2f(y) and ...
Using the fixed point method, we prove the generalized Hyers-Ulam stability of the following additiv...
We investigate the stability of the functional equation 2(+)+(−)+(−)−3()−(−)−3()−(−)=0 by using the ...
We use a fixed point method to investigate the stability problem of the quadratic functional equatio...
Abstract. In this paper, we investigate the stability of a functional equation f(x+y+z)−f(x+y)−f(y+z...
We investigate the general functional equation of the form f(ax+by+cz)-abf(x+y)-bcf(y+z) − acf(x+z)-...
Abstract Using the fixed-point method, we prove the generalized Hyers-Ulam stability of the function...
We use a fixed point method to investigate the stability problem of the quadratic functional equatio...
By applying a fixed point approach, we investigate the stability problems for an AQCQ functional equ...
We use a fixed point method to investigate the stability problem of the quadratic functional equatio...
By applying the fixed point method, we will prove the Hyers-Ulam-Rassias stability of the functional...
Using fixed point method, we prove the Hyers-Ulam stability of the orthogonally additive-additive an...
In this paper, we investigate the quadratic alpha-functional equation 2f (x) + 2 f (y) - f (x y) ...
Using the fixed point method, we prove the Hyers-Ulam stability of the orthogonally additive-quartic...
AbstractIn this paper, we obtain the general solution and the stability of the 2-variable quadratic ...
Lee, An and Park introduced the quadratic functional equation f(2x+y) + f(2x-y) = 8f(x) + 2f(y) and ...
Using the fixed point method, we prove the generalized Hyers-Ulam stability of the following additiv...
We investigate the stability of the functional equation 2(+)+(−)+(−)−3()−(−)−3()−(−)=0 by using the ...
We use a fixed point method to investigate the stability problem of the quadratic functional equatio...
Abstract. In this paper, we investigate the stability of a functional equation f(x+y+z)−f(x+y)−f(y+z...
We investigate the general functional equation of the form f(ax+by+cz)-abf(x+y)-bcf(y+z) − acf(x+z)-...
Abstract Using the fixed-point method, we prove the generalized Hyers-Ulam stability of the function...
We use a fixed point method to investigate the stability problem of the quadratic functional equatio...
By applying a fixed point approach, we investigate the stability problems for an AQCQ functional equ...
We use a fixed point method to investigate the stability problem of the quadratic functional equatio...
By applying the fixed point method, we will prove the Hyers-Ulam-Rassias stability of the functional...
Using fixed point method, we prove the Hyers-Ulam stability of the orthogonally additive-additive an...
In this paper, we investigate the quadratic alpha-functional equation 2f (x) + 2 f (y) - f (x y) ...
Using the fixed point method, we prove the Hyers-Ulam stability of the orthogonally additive-quartic...
AbstractIn this paper, we obtain the general solution and the stability of the 2-variable quadratic ...
Lee, An and Park introduced the quadratic functional equation f(2x+y) + f(2x-y) = 8f(x) + 2f(y) and ...
Using the fixed point method, we prove the generalized Hyers-Ulam stability of the following additiv...