Sign of the solutions of linear fractional differential equations and some applications

Abstract

In this work we wish to highlight some consequences of a recent result proved in [N. D. Cong and H. T. Tuan, Generation of nonlocal fractional dynamical systems by fractional differential equations, J. Integral Equations Appl. 29 (2017), no. 4, 585-608]. Particular emphasis will be given to its application on fractional variational problems of Herglotz type.