分数阶泛函微分方程 D^{0.5}x(t)=sin(x(t-pi/2))，t>=0, with initial fun x(t)=0.1,tin[-pi/2,0]，matlab源代码，可以帮助学习分数阶微分方程的朋友进行数值模拟，画出解的图像，便于研究解的性质，和常微分方程比较，找出解的区别，进一步研究模型的优越性
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