By using inequalities, fixed point theorems, and lower and upper solution method, the existence and uniqueness of a class of fractional initial value problems, are discussed, where is the standard Riemann-Liouville fractional derivative, . Some mistakes in the literature are pointed out and some new inequalities and existence and uniqueness results are obtained.
"The Existence and Uniqueness of a Class of Fractional Differential Equations." Abstr. Appl. Anal. 2014 1 - 6, 2014. https://doi.org/10.1155/2014/486040