TY - JOUR AU - Chang, I.-S. AU - Kim, H.-M. AU - Lee, H.-W. PY - 2023 TI - Approximation of almost quadratic mappings via modular functional JO - Journal of Mathematics and Computer Science SP - 106--117 VL - 29 IS - 2 AB - In this paper, we present generalized stability results of refined quadratic functional equation \[ f(ax-by)=abf(x-y)+a(a-b)f(x)+b(b-a)f(y), \] for any fixed nonzero integer numbers \(a,b\in\mathbb{Z}\) with \(a\neq b\) in modular spaces. As results, we generalize stability results of a quadratic functional equation in [{K.-W. Jun, H.-M. Kim, J. Son, Functional Equations in Mathematical Analysis, \(\bf{2012}\) (2012), 153--164}]. SN - ISSN 2008-949X UR - http://dx.doi.org/10.22436/jmcs.029.02.01 DO - 10.22436/jmcs.029.02.01 ID - Chang2023 ER -