supported partially by National Natural Science Foundation of China(Grant Nos. 10971105, 10990012),,Natural Science Foundation of Tianjin (Grant No. 09JCYBJC01000)
A dynamical system is called a null system, if the topological sequence entropy along any strictly increasing sequence of non-negative integers is 0. Let 0≦p≦
In this paper, we consider the following equation ut=(um)xx+(un)x, with the initial condition as Dirac measure. Attention is focused on existence, nonexistence,
Conjugate gradient methods have played a special role in solving large scale nonlinear problems.Recently,the author and Dai proposed an efcient nonlinear conjug
A longstanding open question of Connes asks whether any finite von Neumann algebra embeds into an ultraproduct of finite-dimensional matrix algebras.As of yet,a