Timeline for Questions about existence of injections between infinite sets and the sets of all infinite topologies on them
Current License: CC BY-SA 4.0
3 events
| when toggle format | what | by | license | comment | |
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| Mar 24, 2020 at 12:58 | comment | added | მამუკა ჯიბლაძე | @Ante This will not change much: for each subset $Y$ there is a topology consisting of those sets which contain $Y$ (together with the empty set). These topologies are all different for different $Y$, and for infinite $Y$ they consist of infinite sets only (except for the empty set, which should be excluded by you anyway). | |
| Mar 24, 2020 at 7:57 | comment | added | user153451 | Is much changed if every topology consists of an infinite number of sets such that each of them is also infinite? | |
| Mar 24, 2020 at 4:37 | history | answered | Keith Kearnes | CC BY-SA 4.0 |