Topological properties of approximation operators based on reflexive and symmetric relations
QIAO Quan-xi1,2,QIN Ke-yun1
1.Department of Mathematics,Southwest Jiaotong University,Chengdu 610031,China 2.School of Mathematics & Information Science,Henan Polytechnic University,Jiaozuo,Henan 454000,China
QIAO Quan-xi1,2,QIN Ke-yun1. Topological properties of approximation operators based on reflexive and symmetric relations[J]. Computer Engineering and Applications, 2008, 44(26): 23-24.