A generalized area integral estimate and applications
Periodic Solutions of Certain n-th Order Nonlinear Differential Equations
Applicando il Teorema del punto fisso di Schauder si dimostra l'esistenza di soluzioni periodiche di un'equazione differenziale ordinaria di ordine n quasi non lineare.
A note on Perng's unified field theory
On the generalizations of Siegel's fixed point theorem.
In this paper, we establish a new version of Siegel's fixed point theorem in generating spaces of quasi-metric family. As consequences, we obtain general versions of the Downing-Kirk's fixed point and Caristi's fixed point theorem in the same spaces. Some applications of these results to fuzzy metric spaces and probabilistic metric spaces are presented.
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