关于相对拓扑

On Relative Topology

中文摘要:

      

英文摘要:

      Using relative topology to define new concept, if we are not to take care, it may be wrong. For example, at the p. 135 in the M. Eisenberg "Topolgy", there is a contradictory argument.We discuss with another example that the "closure" concept may be defined from three different viewpoints, they reflect that total space topology is the better background than the relative topology.