Results 91 to 94 of about 547 (94)

Stability of $n$-th Order Flett's Points and Lagrange's Points

Sarajevo Journal of Mathematics
In this article we show the stability of Flett's points and Lagrange's points in the sense of Hyers and Ulam.   2000 Mathematics Subject Classification.
Iwona Pawlikowska
semanticscholar   +1 more source

Fuzzy stability of the cubic and quadratic functional equation

, 2016
In this paper, we investigate a fuzzy version of stability for the functional equation f(x+ 2y)− 2f(x+ y) + 2f(x− y)− f(x− 2y)− f(2y) + 4f(−y) = 0 in the sense of Mirmostafaee and Moslehian.
Yang-Hi Lee, Soon-Mo Jung
semanticscholar   +1 more source

Superstability of a Pexider-type trigonometric functional equation in normed algebras

, 2015
The aim of this paper is to study the superstability of the following pexiderized cosine functional: f1(x+ y) + f2(x− y) = λg1(x)g2(y), Corresponding author 2840 Iz-iddine EL-Fassi, Samir Kabbaj and Gwang Hui Kim where f1, f2, 2g1, g2 : V → A are unknown
Iz-iddine El-Fassi, S. Kabbaj, G. Kim
semanticscholar   +1 more source

Generalized Hyers-Ulam stability of a 3-dimensional quadratic functional equation in modular spaces

, 2016
In this paper, we prove the stability problem for a 3-dimensional quadratic functional equation 9f ( x+ y + z 3 ) −f(x+y)−f(y+z)−f(x+z)+f(x)+f(y)+f(z) = 0 in modular spaces by applying the direct method.
S. Jin, Yang-Hi Lee
semanticscholar   +1 more source