用偏序度量空间上的压缩映像不动点定理研究分数阶两点边值问题:D0-αu(t)=f(t,u(t)),0t1, u(0) =u(1) =u'(0) =u'(l) =0其中:3〈α≤4是实数;D0^a+是标准的Riemann—Liouville微分.证明了上述两点边值问题正解的存在唯一性.
We gave an existence and uniqueness for the solution of a nonlinear fractional differential equation boundary value problem D0-αu(t)=f(t,u(t)),0t1, u(0) =u(1) =u'(0) =u'(l) =0, where 3α≤4 is a real number,and D(0+)αis the standard Riemann-Liouville differentiation.Our result relies on a fixed point theorem for generalized contraction in partially ordered complete metric spaces.