specific ellipticity

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