JOURNAL OF COMPUTATIONAL ANALYSIS AND APPLICATIONS, 권: 16, 호: 4, 페이지: 654-660
Abstract
In this paper, we investigate the Hyers-Ulam stability of the following function inequalityparallel to af(x) + bf(y) + cf(z)parallel to <= parallel to f(alpha x + beta y + gamma z)parallel to (1 <vertical bar a + b + c vertical bar)in Banach spaces.