丢番图逼近、环面T^2上的Gevrey亚椭圆性与几乎周期运动

Diophantine Approximation,Gevrey Hypoellipticity and Almost Periodic Motion on the Torus T^2

文中考虑一类最多可以指数地有理逼近的无理数，并指出它们自然地存在于偏微分方程解析理论及动力系统中．

In this paper, we consider a class of irrational rumber which can be approximat-ed by rational number at most exponental order, Applications are given in partial differen-tial equation and dynamical systems.