Add to ORKGABSTRACT. In 1940 (and 1968) S. M. Ulam proposed the well-known Ulam stability problem. In 1941 D.H. Hyers solved the Hyers-Ulam problem for linear mappings. In 1951 D. G. Bourgin has been the second author treating the Ulam problem for additive mappings. In 1978 according to P.M. Gruber this kind of stability problems is of particular interest in probability theory and in the case of functional equations of different types. In 1982-2004 we established the Hyers-Ulam stability for the Ulam problem for different mappings. In 1992-2000 J.M. Rassias investigated the Ulam stability for Euler-Lagrange mappings. In this article we solve the Ulam problem for Euler-Lagrange type quadratic functional equations. These stability results can be applied...
Abstract In this paper the general method for proving stability of linear functional equations is d...
ABSTRACT. In this paper, we prove two general theorems about Hyers-Ulam stability of functional equa...
ABSTRACT. In 1964 S. M. Ulam [6] proposed the general Ulam stability problem: " When is it tr...
ABSTRACT. In 1940 (and 1968) S. M. Ulam proposed the well-known Ulam stability problem. In 1941 D. H...
AbstractIn 1940 S. M. Ulam proposed at the University of Wisconsin theproblem: “Give conditions in o...
conditions in order for a linear mapping near an approximately linear mapping to exist.' '...
We solve the generalized Hyers-Ulam stability problem for multidimensional Euler-Lagrange quadratic ...
Abstract. In 1940 and in 1964 S. M. Ulam proposed the general problem: “When is it true that by chan...
In this survey paper we present some of the main results on Ulam-Hyers-Rassias stability for importa...
AbstractIn 1941 D.H. Hyers solved the well-known Ulam stability problem for linear mappings. In 1951...
Abstract. In 1968 S. M. Ulam proposed the general problem: When is it true that by changing a little...
Abstract. In 1968 S. M. Ulam proposed the general problem: When is it true that by changing a little...
In 1940 and 1964, Ulam proposed the general problem: “When is it true that by changing a little the ...
In 1941 D.H. Hyers solved the well-known Ulam stability problem for linear mappings. In 1951 D.G. Bo...
mapping near an approximately linear mapping to exist". According to P. M. Gru-ber (Trans. Amer...
Abstract In this paper the general method for proving stability of linear functional equations is d...
ABSTRACT. In this paper, we prove two general theorems about Hyers-Ulam stability of functional equa...
ABSTRACT. In 1964 S. M. Ulam [6] proposed the general Ulam stability problem: " When is it tr...
ABSTRACT. In 1940 (and 1968) S. M. Ulam proposed the well-known Ulam stability problem. In 1941 D. H...
AbstractIn 1940 S. M. Ulam proposed at the University of Wisconsin theproblem: “Give conditions in o...
conditions in order for a linear mapping near an approximately linear mapping to exist.' '...
We solve the generalized Hyers-Ulam stability problem for multidimensional Euler-Lagrange quadratic ...
Abstract. In 1940 and in 1964 S. M. Ulam proposed the general problem: “When is it true that by chan...
In this survey paper we present some of the main results on Ulam-Hyers-Rassias stability for importa...
AbstractIn 1941 D.H. Hyers solved the well-known Ulam stability problem for linear mappings. In 1951...
Abstract. In 1968 S. M. Ulam proposed the general problem: When is it true that by changing a little...
Abstract. In 1968 S. M. Ulam proposed the general problem: When is it true that by changing a little...
In 1940 and 1964, Ulam proposed the general problem: “When is it true that by changing a little the ...
In 1941 D.H. Hyers solved the well-known Ulam stability problem for linear mappings. In 1951 D.G. Bo...
mapping near an approximately linear mapping to exist". According to P. M. Gru-ber (Trans. Amer...
Abstract In this paper the general method for proving stability of linear functional equations is d...
ABSTRACT. In this paper, we prove two general theorems about Hyers-Ulam stability of functional equa...
ABSTRACT. In 1964 S. M. Ulam [6] proposed the general Ulam stability problem: " When is it tr...