问题如下：

Consider the following topologies on R:
1. T1 = the standard topology,
2. T2 = the topology of RK,
3. T3 = the finite complement topology,
4. T4 = the topology having all sets(-∞, a)={x I x<a} as basis.

Determine, for each of the topologies, which of the others it contains.

也可以点击下面原图更清楚：




谢谢！
※ 修改:·Aries008 于 Oct  8 03:00:59 2023 修改本文·[FROM: 24.114.62.*]
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