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math.FA2015
On characterizations of -functions
Wei-Shih Du
In this paper, we introduce and share the new concept of -functions and its some characterizations.
math.FA2015
The Hyers-Ulam stability for nonlinear Volterra integral equations via a generalized Diaz-Margolis's fixed point theorem
Wei-Shih Du
In this work, we prove an existence theorem of the Hyers-Ulam stability for the nonlinear Volterra integral equations which improves and generalizes Castro-Ramos theorem by using s…