0112現代数学の系譜 雑談 ◆e.a0E5TtKE
2019/12/28(土) 19:30:17.62ID:25QO+/o4>順序数そのものが定まってないのにノイマンの方法もへったくれもありません。
おまえら、全然読めてないね(^^
”The standard topologies on R, Q, Z, and N are the order topologies.”な
”The standard topologies”な
”The standard”な! ww(^^
(>>63より)
https://en.wikipedia.org/wiki/Order_topology
Order topology
(抜粋)
The open sets in X are the sets that are a union of (possibly infinitely many) such open intervals and rays.
A topological space X is called orderable if there exists a total order on its elements such that the order topology induced by that order and the given topology on X coincide. The order topology makes X into a completely normal Hausdorff space.
The standard topologies on R, Q, Z, and N are the order topologies.