No books dealing with a comprehensive illustration of the fast develo** field of nonlinear
analysis had been published for the mathematicians interested in this field for more than a …

The paper is a survey about Hyers—Ulam stability of functional equations and systems in
several variables. Its content is divided in the following chapters: 1.—Introduction. Historical …

We discuss on the generalized Ulam-Hyers stability for functional equations in a single
variable, including the nonlinear functional equations, the linear functional equations, and a …

ULAM STABILITY FOR THE ORTHOGONALLY GENERAL EULER - LAGRANGE TYPE
FUNCTIONAL EQUATION Page 1 ULAM STABILITY FOR THE ORTHOGONALLY GENERAL …

Abstract We prove the Hyers-Ulam-Rassias stability of homomorphisms in real Banach
algebras and of generalized derivations on real Banach algebras for the following Cauchy …

This paper is devoted to discuss Hilfer fractional evolution equations through its
controllability and stability in a Banach space. We achieve our claims and conclusions by …

Sažetak In 1940, SM Ulam proposed at the University of Wisconsin the problem:" Give
conditions in order for a linear map** near an approximately linear map** to exist." In …

Sažetak In 1968 SM Ulam proposed the general problem: When is it true taht by changing a
little the hypotheses of a theorem one can still assert that the thesis of the theorem remains …

A NEW METHOD FOR THE GENERALIZED HYERS-ULAM-RASSIAS STABILITY 1. Introduction
The stability problem as started by SM Ulam [52] Page 1 Int. J. Nonlinear Anal. Appl. 1 (2010) …

In this article, we prove the nonlinear stability of the quartic functional equation 1 6 f (x+ 4 y)+
f (4 xy)= 3 0 6 9 fx+ y 3+ f (x+ 2 y)(1)+ 1 3 6 f (xy)-1 3 9 4 f (x+ y)+ 4 2 5 f (y)-1 5 3 0 f (x)(2)(3) …