Positive solutions for nonlinear fractional differential equations

被引:29
作者
Boulares, Hamid [1 ]
Ardjouni, Abdelouaheb [2 ,3 ]
Laskri, Yamina [4 ]
机构
[1] Guelma Univ, Depatement Math, Fac Sci, Guelma 24000, Algeria
[2] Univ Souk Ahras, Fac Sci & Technol, Dept Math & Informat, POB 1553, Souk Ahras 41000, Algeria
[3] Univ Annaba, Dept Math, Appl Math Lab, Fac Sci, POB 12, Annaba 23000, Algeria
[4] Univ Annaba, Depatement Math, Fac Sci, POB 12, Annaba 23000, Algeria
关键词
Fractional differential equations; Positive solutions; Upper and lower solutions; Existence; Uniqueness; Fixed point theorems; BOUNDARY-VALUE PROBLEM; EXISTENCE;
D O I
10.1007/s11117-016-0461-x
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
We study the existence and uniqueness of positive solutions of the nonlinear fractional differential equation {D-C(alpha) x (t) = f (t, x(t)) + D-C(alpha-1) g (t, x (t)), 0 < t <= T, x (0) =theta(1) > 0, x' (0) =theta(2) > 0, where 1 < alpha <= 2. In the process we convert the given fractional differential equation into an equivalent integral equation. Then we construct appropriate mapping and employ Schauder fixed point theorem and the method of upper and lower solutions to show the existence of a positive solution of this equation. We also use the Banach fixed point theorem to show the existence of a unique positive solution. The results obtained here extend the work of Matar (AMUC 84(1):51-57, 2015 [7]). Finally, an example is given to illustrate our results.
引用
收藏
页码:1201 / 1212
页数:12
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