Department of Mathematics, Taiyuan University of Science and Technology,Shanxi 030024, P. R. China;
Department of Mathematics, Taiyuan University of Science and Technology,Shanxi 030024, P. R. China;
Department of Mathematics, Taiyuan University of Science and Technology,Shanxi 030024, P. R. China;
Neumann; 代数学; 保存; 地图; Hilbert; 线性; 晶型; 非零;