Diophantine Approximation,Gevrey Hypoellipticity and Almost Periodic Motion on the Torus T~2;
丢番图逼近、环面T~2上的Gevrey亚椭圆性与几乎周期运动
Solvability and Hypoellipticity for Operator ■_μ~m on the Heisenberg Group H~n;
海森堡群H~n上算子_μ~m的可解性和亚椭圆性
Hypoellipticity of a Class of Double Characteristic Operator in Higher Dimension;
一类重特征算子的亚椭圆性
Using ellipse properties to find eyes in binary image;
用黑斑的椭圆性质在二值化图像中探测眼睛
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